Finding the Fourth Proportional to 147,978.80, 204,204.76 and 84,311.20

Step by Step Solution

1. Step 1: Write the proportion equation
   147,978.80 : 204,204.76 = 84,311.20 : x
2. Step 2: Convert to fraction form
   147,978.80/204,204.76 = 84,311.20/x
3. Step 3: Cross multiply
   147,978.80x = 204,204.76 × 84,311.20
4. Step 4: Simplify right side
   147,978.80x = 17,216,748,361.31
5. Step 5: Solve for x
   x = 17,216,748,361.31/147,978.80
6. Step 6: Final answer
   x = 116,346.05