Finding the Fourth Proportional to 2,124.21, 2,931.39 and 1,192.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.21 : 2,931.39 = 1,192.71 : x
2. Step 2: Convert to fraction form
   2,124.21/2,931.39 = 1,192.71/x
3. Step 3: Cross multiply
   2,124.21x = 2,931.39 × 1,192.71
4. Step 4: Simplify right side
   2,124.21x = 3,496,298.17
5. Step 5: Solve for x
   x = 3,496,298.17/2,124.21
6. Step 6: Final answer
   x = 1,645.93