Finding the Fourth Proportional to 413,200.27, 619,843.61 and 146,985.31

Step by Step Solution

1. Step 1: Write the proportion equation
   413,200.27 : 619,843.61 = 146,985.31 : x
2. Step 2: Convert to fraction form
   413,200.27/619,843.61 = 146,985.31/x
3. Step 3: Cross multiply
   413,200.27x = 619,843.61 × 146,985.31
4. Step 4: Simplify right side
   413,200.27x = 91,107,904,432.44
5. Step 5: Solve for x
   x = 91,107,904,432.44/413,200.27
6. Step 6: Final answer
   x = 220,493.33