Finding the Fourth Proportional to 86,978.68, 130,493.31 and 36,401.57

Step by Step Solution

1. Step 1: Write the proportion equation
   86,978.68 : 130,493.31 = 36,401.57 : x
2. Step 2: Convert to fraction form
   86,978.68/130,493.31 = 36,401.57/x
3. Step 3: Cross multiply
   86,978.68x = 130,493.31 × 36,401.57
4. Step 4: Simplify right side
   86,978.68x = 4,750,161,358.50
5. Step 5: Solve for x
   x = 4,750,161,358.50/86,978.68
6. Step 6: Final answer
   x = 54,612.94