Finding the Fourth Proportional to 2,123.97, 2,931.06 and 1,192.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.97 : 2,931.06 = 1,192.47 : x
2. Step 2: Convert to fraction form
   2,123.97/2,931.06 = 1,192.47/x
3. Step 3: Cross multiply
   2,123.97x = 2,931.06 × 1,192.47
4. Step 4: Simplify right side
   2,123.97x = 3,495,201.12
5. Step 5: Solve for x
   x = 3,495,201.12/2,123.97
6. Step 6: Final answer
   x = 1,645.60