Finding the Fourth Proportional to 99,200.22, 136,897.31 and 53,879.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,200.22 : 136,897.31 = 53,879.10 : x
2. Step 2: Convert to fraction form
   99,200.22/136,897.31 = 53,879.10/x
3. Step 3: Cross multiply
   99,200.22x = 136,897.31 × 53,879.10
4. Step 4: Simplify right side
   99,200.22x = 7,375,903,585.83
5. Step 5: Solve for x
   x = 7,375,903,585.83/99,200.22
6. Step 6: Final answer
   x = 74,353.70