Finding the Fourth Proportional to 99,111.93, 136,775.46 and 53,790.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.93 : 136,775.46 = 53,790.31 : x
2. Step 2: Convert to fraction form
   99,111.93/136,775.46 = 53,790.31/x
3. Step 3: Cross multiply
   99,111.93x = 136,775.46 × 53,790.31
4. Step 4: Simplify right side
   99,111.93x = 7,357,194,393.79
5. Step 5: Solve for x
   x = 7,357,194,393.79/99,111.93
6. Step 6: Final answer
   x = 74,231.17