Finding the Fourth Proportional to 99,665,086.35, 149,497,629.53 and 72,791,230.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99,665,086.35 : 149,497,629.53 = 72,791,230.35 : x
2. Step 2: Convert to fraction form
   99,665,086.35/149,497,629.53 = 72,791,230.35/x
3. Step 3: Cross multiply
   99,665,086.35x = 149,497,629.53 × 72,791,230.35
4. Step 4: Simplify right side
   99,665,086.35x = 10,882,116,387,533,236
5. Step 5: Solve for x
   x = 10,882,116,387,533,236/99,665,086.35
6. Step 6: Final answer
   x = 109,186,845.53