Finding the Fourth Proportional to 42,108,875.28, 63,169,338.18 and 12,965,180.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,108,875.28 : 63,169,338.18 = 12,965,180.15 : x
2. Step 2: Convert to fraction form
   42,108,875.28/63,169,338.18 = 12,965,180.15/x
3. Step 3: Cross multiply
   42,108,875.28x = 63,169,338.18 × 12,965,180.15
4. Step 4: Simplify right side
   42,108,875.28x = 819,001,849,666,515.88
5. Step 5: Solve for x
   x = 819,001,849,666,515.88/42,108,875.28
6. Step 6: Final answer
   x = 19,449,625.39