Finding the Fourth Proportional to 118,142.26, 163,172.45 and 86,020.52

Step by Step Solution

1. Step 1: Write the proportion equation
   118,142.26 : 163,172.45 = 86,020.52 : x
2. Step 2: Convert to fraction form
   118,142.26/163,172.45 = 86,020.52/x
3. Step 3: Cross multiply
   118,142.26x = 163,172.45 × 86,020.52
4. Step 4: Simplify right side
   118,142.26x = 14,036,180,123.81
5. Step 5: Solve for x
   x = 14,036,180,123.81/118,142.26
6. Step 6: Final answer
   x = 118,807.45