Finding the Fourth Proportional to 1,158.15, 1,598.10 and 710.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.15 : 1,598.10 = 710.22 : x
2. Step 2: Convert to fraction form
   1,158.15/1,598.10 = 710.22/x
3. Step 3: Cross multiply
   1,158.15x = 1,598.10 × 710.22
4. Step 4: Simplify right side
   1,158.15x = 1,134,999.03
5. Step 5: Solve for x
   x = 1,134,999.03/1,158.15
6. Step 6: Final answer
   x = 980.01