Finding the Fourth Proportional to 1,400.88, 2,100.72 and 706.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.88 : 2,100.72 = 706.68 : x
2. Step 2: Convert to fraction form
   1,400.88/2,100.72 = 706.68/x
3. Step 3: Cross multiply
   1,400.88x = 2,100.72 × 706.68
4. Step 4: Simplify right side
   1,400.88x = 1,484,536.81
5. Step 5: Solve for x
   x = 1,484,536.81/1,400.88
6. Step 6: Final answer
   x = 1,059.72