Finding the Fourth Proportional to 2,801.15, 4,200.71 and 926.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,801.15 : 4,200.71 = 926.69 : x
2. Step 2: Convert to fraction form
   2,801.15/4,200.71 = 926.69/x
3. Step 3: Cross multiply
   2,801.15x = 4,200.71 × 926.69
4. Step 4: Simplify right side
   2,801.15x = 3,892,737.26
5. Step 5: Solve for x
   x = 3,892,737.26/2,801.15
6. Step 6: Final answer
   x = 1,389.70