Finding the Fourth Proportional to 1,543.61, 2,316.17 and 958.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,543.61 : 2,316.17 = 958.43 : x
2. Step 2: Convert to fraction form
   1,543.61/2,316.17 = 958.43/x
3. Step 3: Cross multiply
   1,543.61x = 2,316.17 × 958.43
4. Step 4: Simplify right side
   1,543.61x = 2,219,892.30
5. Step 5: Solve for x
   x = 2,219,892.30/1,543.61
6. Step 6: Final answer
   x = 1,438.12