Finding the Fourth Proportional to 86,103.32, 129,131.55 and 54,465.89

Step by Step Solution

1. Step 1: Write the proportion equation
   86,103.32 : 129,131.55 = 54,465.89 : x
2. Step 2: Convert to fraction form
   86,103.32/129,131.55 = 54,465.89/x
3. Step 3: Cross multiply
   86,103.32x = 129,131.55 × 54,465.89
4. Step 4: Simplify right side
   86,103.32x = 7,033,264,152.17
5. Step 5: Solve for x
   x = 7,033,264,152.17/86,103.32
6. Step 6: Final answer
   x = 81,684.01