Finding the Fourth Proportional to 99,031, 136,662.78 and 54,318.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,031 : 136,662.78 = 54,318.04 : x
2. Step 2: Convert to fraction form
   99,031/136,662.78 = 54,318.04/x
3. Step 3: Cross multiply
   99,031x = 136,662.78 × 54,318.04
4. Step 4: Simplify right side
   99,031x = 7,423,254,350.55
5. Step 5: Solve for x
   x = 7,423,254,350.55/99,031
6. Step 6: Final answer
   x = 74,958.90