Finding the Fourth Proportional to 72,259,740.83, 99,718,190.85 and 39,219,989.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,259,740.83 : 99,718,190.85 = 39,219,989.86 : x
2. Step 2: Convert to fraction form
   72,259,740.83/99,718,190.85 = 39,219,989.86/x
3. Step 3: Cross multiply
   72,259,740.83x = 99,718,190.85 × 39,219,989.86
4. Step 4: Simplify right side
   72,259,740.83x = 3,910,946,433,595,066.50
5. Step 5: Solve for x
   x = 3,910,946,433,595,066.50/72,259,740.83
6. Step 6: Final answer
   x = 54,123,449.50