Finding the Fourth Proportional to 1,401.32, 2,101.86 and 707.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.32 : 2,101.86 = 707.72 : x
2. Step 2: Convert to fraction form
   1,401.32/2,101.86 = 707.72/x
3. Step 3: Cross multiply
   1,401.32x = 2,101.86 × 707.72
4. Step 4: Simplify right side
   1,401.32x = 1,487,528.36
5. Step 5: Solve for x
   x = 1,487,528.36/1,401.32
6. Step 6: Final answer
   x = 1,061.52