Finding the Fourth Proportional to 99,200.42, 136,897.56 and 53,879.29

Step by Step Solution

1. Step 1: Write the proportion equation
   99,200.42 : 136,897.56 = 53,879.29 : x
2. Step 2: Convert to fraction form
   99,200.42/136,897.56 = 53,879.29/x
3. Step 3: Cross multiply
   99,200.42x = 136,897.56 × 53,879.29
4. Step 4: Simplify right side
   99,200.42x = 7,375,942,993.29
5. Step 5: Solve for x
   x = 7,375,942,993.29/99,200.42
6. Step 6: Final answer
   x = 74,353.95