Finding the Fourth Proportional to 116,642.59, 160,971.87 and 65,658.61

Step by Step Solution

1. Step 1: Write the proportion equation
   116,642.59 : 160,971.87 = 65,658.61 : x
2. Step 2: Convert to fraction form
   116,642.59/160,971.87 = 65,658.61/x
3. Step 3: Cross multiply
   116,642.59x = 160,971.87 × 65,658.61
4. Step 4: Simplify right side
   116,642.59x = 10,569,189,233.30
5. Step 5: Solve for x
   x = 10,569,189,233.30/116,642.59
6. Step 6: Final answer
   x = 90,611.75