Finding the Fourth Proportional to 99,318.04, 137,061.59 and 53,999.07

Step by Step Solution

1. Step 1: Write the proportion equation
   99,318.04 : 137,061.59 = 53,999.07 : x
2. Step 2: Convert to fraction form
   99,318.04/137,061.59 = 53,999.07/x
3. Step 3: Cross multiply
   99,318.04x = 137,061.59 × 53,999.07
4. Step 4: Simplify right side
   99,318.04x = 7,401,198,392.72
5. Step 5: Solve for x
   x = 7,401,198,392.72/99,318.04
6. Step 6: Final answer
   x = 74,520.18