Finding the Fourth Proportional to 1,109.62, 1,530.12 and 711.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.62 : 1,530.12 = 711.10 : x
2. Step 2: Convert to fraction form
   1,109.62/1,530.12 = 711.10/x
3. Step 3: Cross multiply
   1,109.62x = 1,530.12 × 711.10
4. Step 4: Simplify right side
   1,109.62x = 1,088,068.33
5. Step 5: Solve for x
   x = 1,088,068.33/1,109.62
6. Step 6: Final answer
   x = 980.58