Finding the Fourth Proportional to 99,212.18, 136,833.56 and 65,255.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,212.18 : 136,833.56 = 65,255.52 : x
2. Step 2: Convert to fraction form
   99,212.18/136,833.56 = 65,255.52/x
3. Step 3: Cross multiply
   99,212.18x = 136,833.56 × 65,255.52
4. Step 4: Simplify right side
   99,212.18x = 8,929,145,111.25
5. Step 5: Solve for x
   x = 8,929,145,111.25/99,212.18
6. Step 6: Final answer
   x = 90,000.49