Finding the Fourth Proportional to 106,978.20, 147,634.53 and 59,231.55

Step by Step Solution

1. Step 1: Write the proportion equation
   106,978.20 : 147,634.53 = 59,231.55 : x
2. Step 2: Convert to fraction form
   106,978.20/147,634.53 = 59,231.55/x
3. Step 3: Cross multiply
   106,978.20x = 147,634.53 × 59,231.55
4. Step 4: Simplify right side
   106,978.20x = 8,744,622,045.42
5. Step 5: Solve for x
   x = 8,744,622,045.42/106,978.20
6. Step 6: Final answer
   x = 81,742.09