Finding the Fourth Proportional to 2,472.78, 3,710.61 and 913.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,472.78 : 3,710.61 = 913.86 : x
2. Step 2: Convert to fraction form
   2,472.78/3,710.61 = 913.86/x
3. Step 3: Cross multiply
   2,472.78x = 3,710.61 × 913.86
4. Step 4: Simplify right side
   2,472.78x = 3,390,967.62
5. Step 5: Solve for x
   x = 3,390,967.62/2,472.78
6. Step 6: Final answer
   x = 1,371.32