Finding the Fourth Proportional to 99,111.66, 136,887.61 and 65,271.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,111.66 : 136,887.61 = 65,271.42 : x
2. Step 2: Convert to fraction form
   99,111.66/136,887.61 = 65,271.42/x
3. Step 3: Cross multiply
   99,111.66x = 136,887.61 × 65,271.42
4. Step 4: Simplify right side
   99,111.66x = 8,934,848,685.11
5. Step 5: Solve for x
   x = 8,934,848,685.11/99,111.66
6. Step 6: Final answer
   x = 90,149.32