Finding the Fourth Proportional to 1,061.30, 1,464.84 and 707.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.30 : 1,464.84 = 707.78 : x
2. Step 2: Convert to fraction form
   1,061.30/1,464.84 = 707.78/x
3. Step 3: Cross multiply
   1,061.30x = 1,464.84 × 707.78
4. Step 4: Simplify right side
   1,061.30x = 1,036,784.46
5. Step 5: Solve for x
   x = 1,036,784.46/1,061.30
6. Step 6: Final answer
   x = 976.90