Finding the Fourth Proportional to 2,088.28, 3,129.98 and 1,047.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.28 : 3,129.98 = 1,047.72 : x
2. Step 2: Convert to fraction form
   2,088.28/3,129.98 = 1,047.72/x
3. Step 3: Cross multiply
   2,088.28x = 3,129.98 × 1,047.72
4. Step 4: Simplify right side
   2,088.28x = 3,279,342.65
5. Step 5: Solve for x
   x = 3,279,342.65/2,088.28
6. Step 6: Final answer
   x = 1,570.36