Finding the Fourth Proportional to 99,123.38, 136,789.92 and 53,801.36

Step by Step Solution

1. Step 1: Write the proportion equation
   99,123.38 : 136,789.92 = 53,801.36 : x
2. Step 2: Convert to fraction form
   99,123.38/136,789.92 = 53,801.36/x
3. Step 3: Cross multiply
   99,123.38x = 136,789.92 × 53,801.36
4. Step 4: Simplify right side
   99,123.38x = 7,359,483,046.34
5. Step 5: Solve for x
   x = 7,359,483,046.34/99,123.38
6. Step 6: Final answer
   x = 74,245.69