Finding the Fourth Proportional to 1,200.71, 1,657.06 and 703.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.71 : 1,657.06 = 703.31 : x
2. Step 2: Convert to fraction form
   1,200.71/1,657.06 = 703.31/x
3. Step 3: Cross multiply
   1,200.71x = 1,657.06 × 703.31
4. Step 4: Simplify right side
   1,200.71x = 1,165,416.83
5. Step 5: Solve for x
   x = 1,165,416.83/1,200.71
6. Step 6: Final answer
   x = 970.60