Finding the Fourth Proportional to 2,155.23, 3,234.29 and 922.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.23 : 3,234.29 = 922.93 : x
2. Step 2: Convert to fraction form
   2,155.23/3,234.29 = 922.93/x
3. Step 3: Cross multiply
   2,155.23x = 3,234.29 × 922.93
4. Step 4: Simplify right side
   2,155.23x = 2,985,023.27
5. Step 5: Solve for x
   x = 2,985,023.27/2,155.23
6. Step 6: Final answer
   x = 1,385.01