Finding the Fourth Proportional to 99,123.72, 136,790.84 and 53,801.70

Step by Step Solution

1. Step 1: Write the proportion equation
   99,123.72 : 136,790.84 = 53,801.70 : x
2. Step 2: Convert to fraction form
   99,123.72/136,790.84 = 53,801.70/x
3. Step 3: Cross multiply
   99,123.72x = 136,790.84 × 53,801.70
4. Step 4: Simplify right side
   99,123.72x = 7,359,579,736.43
5. Step 5: Solve for x
   x = 7,359,579,736.43/99,123.72
6. Step 6: Final answer
   x = 74,246.40