Finding the Fourth Proportional to 42,478,503.13, 63,718,123.45 and 13,724,641.79

Step by Step Solution

1. Step 1: Write the proportion equation
   42,478,503.13 : 63,718,123.45 = 13,724,641.79 : x
2. Step 2: Convert to fraction form
   42,478,503.13/63,718,123.45 = 13,724,641.79/x
3. Step 3: Cross multiply
   42,478,503.13x = 63,718,123.45 × 13,724,641.79
4. Step 4: Simplify right side
   42,478,503.13x = 874,508,419,916,560.50
5. Step 5: Solve for x
   x = 874,508,419,916,560.50/42,478,503.13
6. Step 6: Final answer
   x = 20,587,081.83