Finding the Fourth Proportional to 1,215,429,068.76, 1,676,778,503.82 and 813,672,249.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,429,068.76 : 1,676,778,503.82 = 813,672,249.92 : x
2. Step 2: Convert to fraction form
   1,215,429,068.76/1,676,778,503.82 = 813,672,249.92/x
3. Step 3: Cross multiply
   1,215,429,068.76x = 1,676,778,503.82 × 813,672,249.92
4. Step 4: Simplify right side
   1,215,429,068.76x = 1,364,348,137,820,710,656
5. Step 5: Solve for x
   x = 1,364,348,137,820,710,656/1,215,429,068.76
6. Step 6: Final answer
   x = 1,122,523,866.58