Finding the Fourth Proportional to 1,200.21, 1,656.32 and 702.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.21 : 1,656.32 = 702.89 : x
2. Step 2: Convert to fraction form
   1,200.21/1,656.32 = 702.89/x
3. Step 3: Cross multiply
   1,200.21x = 1,656.32 × 702.89
4. Step 4: Simplify right side
   1,200.21x = 1,164,210.76
5. Step 5: Solve for x
   x = 1,164,210.76/1,200.21
6. Step 6: Final answer
   x = 970.01