Finding the Fourth Proportional to 99,124.74, 136,792.20 and 53,802.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,124.74 : 136,792.20 = 53,802.72 : x
2. Step 2: Convert to fraction form
   99,124.74/136,792.20 = 53,802.72/x
3. Step 3: Cross multiply
   99,124.74x = 136,792.20 × 53,802.72
4. Step 4: Simplify right side
   99,124.74x = 7,359,792,434.78
5. Step 5: Solve for x
   x = 7,359,792,434.78/99,124.74
6. Step 6: Final answer
   x = 74,247.79