Finding the Fourth Proportional to 1,154.70, 1,593.50 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,154.70 : 1,593.50 = 630.72 : x
2. Step 2: Convert to fraction form
   1,154.70/1,593.50 = 630.72/x
3. Step 3: Cross multiply
   1,154.70x = 1,593.50 × 630.72
4. Step 4: Simplify right side
   1,154.70x = 1,005,049.17
5. Step 5: Solve for x
   x = 1,005,049.17/1,154.70
6. Step 6: Final answer
   x = 870.40