Finding the Fourth Proportional to 146,354.50, 219,614.78 and 57,670.28

Step by Step Solution

1. Step 1: Write the proportion equation
   146,354.50 : 219,614.78 = 57,670.28 : x
2. Step 2: Convert to fraction form
   146,354.50/219,614.78 = 57,670.28/x
3. Step 3: Cross multiply
   146,354.50x = 219,614.78 × 57,670.28
4. Step 4: Simplify right side
   146,354.50x = 12,665,245,724.40
5. Step 5: Solve for x
   x = 12,665,245,724.40/146,354.50
6. Step 6: Final answer
   x = 86,538.14