Finding the Fourth Proportional to 1,401.88, 2,101.24 and 707.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.88 : 2,101.24 = 707.88 : x
2. Step 2: Convert to fraction form
   1,401.88/2,101.24 = 707.88/x
3. Step 3: Cross multiply
   1,401.88x = 2,101.24 × 707.88
4. Step 4: Simplify right side
   1,401.88x = 1,487,425.77
5. Step 5: Solve for x
   x = 1,487,425.77/1,401.88
6. Step 6: Final answer
   x = 1,061.02