Finding the Fourth Proportional to 99,111.69, 136,775.13 and 53,790.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.69 : 136,775.13 = 53,790.06 : x
2. Step 2: Convert to fraction form
   99,111.69/136,775.13 = 53,790.06/x
3. Step 3: Cross multiply
   99,111.69x = 136,775.13 × 53,790.06
4. Step 4: Simplify right side
   99,111.69x = 7,357,142,449.21
5. Step 5: Solve for x
   x = 7,357,142,449.21/99,111.69
6. Step 6: Final answer
   x = 74,230.82