Finding the Fourth Proportional to 116,686.08, 161,010.72 and 66,375.36

Step by Step Solution

1. Step 1: Write the proportion equation
   116,686.08 : 161,010.72 = 66,375.36 : x
2. Step 2: Convert to fraction form
   116,686.08/161,010.72 = 66,375.36/x
3. Step 3: Cross multiply
   116,686.08x = 161,010.72 × 66,375.36
4. Step 4: Simplify right side
   116,686.08x = 10,687,144,503.86
5. Step 5: Solve for x
   x = 10,687,144,503.86/116,686.08
6. Step 6: Final answer
   x = 91,588.86