Finding the Fourth Proportional to 287,354.88, 396,510.72 and 160,005.12

Step by Step Solution

1. Step 1: Write the proportion equation
   287,354.88 : 396,510.72 = 160,005.12 : x
2. Step 2: Convert to fraction form
   287,354.88/396,510.72 = 160,005.12/x
3. Step 3: Cross multiply
   287,354.88x = 396,510.72 × 160,005.12
4. Step 4: Simplify right side
   287,354.88x = 63,443,745,334.89
5. Step 5: Solve for x
   x = 63,443,745,334.89/287,354.88
6. Step 6: Final answer
   x = 220,785.34