Finding the Fourth Proportional to 1,631.30, 2,251.30 and 1,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.30 : 2,251.30 = 1,557.50 : x
2. Step 2: Convert to fraction form
   1,631.30/2,251.30 = 1,557.50/x
3. Step 3: Cross multiply
   1,631.30x = 2,251.30 × 1,557.50
4. Step 4: Simplify right side
   1,631.30x = 3,506,399.75
5. Step 5: Solve for x
   x = 3,506,399.75/1,631.30
6. Step 6: Final answer
   x = 2,149.45