Finding the Fourth Proportional to 1,081.52, 1,492.99 and 708.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.52 : 1,492.99 = 708.51 : x
2. Step 2: Convert to fraction form
   1,081.52/1,492.99 = 708.51/x
3. Step 3: Cross multiply
   1,081.52x = 1,492.99 × 708.51
4. Step 4: Simplify right side
   1,081.52x = 1,057,798.34
5. Step 5: Solve for x
   x = 1,057,798.34/1,081.52
6. Step 6: Final answer
   x = 978.07