Finding the Fourth Proportional to 2,877.50, 4,315.98 and 929.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.50 : 4,315.98 = 929.72 : x
2. Step 2: Convert to fraction form
   2,877.50/4,315.98 = 929.72/x
3. Step 3: Cross multiply
   2,877.50x = 4,315.98 × 929.72
4. Step 4: Simplify right side
   2,877.50x = 4,012,652.93
5. Step 5: Solve for x
   x = 4,012,652.93/2,877.50
6. Step 6: Final answer
   x = 1,394.49