Finding the Fourth Proportional to 99,664,090.10, 149,496,135.15 and 72,790,234.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,664,090.10 : 149,496,135.15 = 72,790,234.10 : x
2. Step 2: Convert to fraction form
   99,664,090.10/149,496,135.15 = 72,790,234.10/x
3. Step 3: Cross multiply
   99,664,090.10x = 149,496,135.15 × 72,790,234.10
4. Step 4: Simplify right side
   99,664,090.10x = 10,881,858,674,613,738
5. Step 5: Solve for x
   x = 10,881,858,674,613,738/99,664,090.10
6. Step 6: Final answer
   x = 109,185,351.15