Finding the Fourth Proportional to 1,079.72, 1,490.15 and 707.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.72 : 1,490.15 = 707.01 : x
2. Step 2: Convert to fraction form
   1,079.72/1,490.15 = 707.01/x
3. Step 3: Cross multiply
   1,079.72x = 1,490.15 × 707.01
4. Step 4: Simplify right side
   1,079.72x = 1,053,547.42
5. Step 5: Solve for x
   x = 1,053,547.42/1,079.72
6. Step 6: Final answer
   x = 975.76