Finding the Fourth Proportional to 99,111.65, 136,774.14 and 53,789.62

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.65 : 136,774.14 = 53,789.62 : x
2. Step 2: Convert to fraction form
   99,111.65/136,774.14 = 53,789.62/x
3. Step 3: Cross multiply
   99,111.65x = 136,774.14 × 53,789.62
4. Step 4: Simplify right side
   99,111.65x = 7,357,028,332.56
5. Step 5: Solve for x
   x = 7,357,028,332.56/99,111.65
6. Step 6: Final answer
   x = 74,229.71