Finding the Fourth Proportional to 1,207,498.84, 1,666,385.88 and 663,624.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,207,498.84 : 1,666,385.88 = 663,624.76 : x
2. Step 2: Convert to fraction form
   1,207,498.84/1,666,385.88 = 663,624.76/x
3. Step 3: Cross multiply
   1,207,498.84x = 1,666,385.88 × 663,624.76
4. Step 4: Simplify right side
   1,207,498.84x = 1,105,854,929,682.39
5. Step 5: Solve for x
   x = 1,105,854,929,682.39/1,207,498.84
6. Step 6: Final answer
   x = 915,822.77