Finding the Fourth Proportional to 2,870.52, 4,306.47 and 922.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.52 : 4,306.47 = 922.66 : x
2. Step 2: Convert to fraction form
   2,870.52/4,306.47 = 922.66/x
3. Step 3: Cross multiply
   2,870.52x = 4,306.47 × 922.66
4. Step 4: Simplify right side
   2,870.52x = 3,973,407.61
5. Step 5: Solve for x
   x = 3,973,407.61/2,870.52
6. Step 6: Final answer
   x = 1,384.21