Finding the Fourth Proportional to 1,081.48, 1,491.07 and 707.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.48 : 1,491.07 = 707.86 : x
2. Step 2: Convert to fraction form
   1,081.48/1,491.07 = 707.86/x
3. Step 3: Cross multiply
   1,081.48x = 1,491.07 × 707.86
4. Step 4: Simplify right side
   1,081.48x = 1,055,465.27
5. Step 5: Solve for x
   x = 1,055,465.27/1,081.48
6. Step 6: Final answer
   x = 975.95