Finding the Fourth Proportional to 2,117.32, 2,921.90 and 1,233.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.32 : 2,921.90 = 1,233.72 : x
2. Step 2: Convert to fraction form
   2,117.32/2,921.90 = 1,233.72/x
3. Step 3: Cross multiply
   2,117.32x = 2,921.90 × 1,233.72
4. Step 4: Simplify right side
   2,117.32x = 3,604,806.47
5. Step 5: Solve for x
   x = 3,604,806.47/2,117.32
6. Step 6: Final answer
   x = 1,702.53