Finding the Fourth Proportional to 1,590.72, 2,386.41 and 617.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590.72 : 2,386.41 = 617.10 : x
2. Step 2: Convert to fraction form
   1,590.72/2,386.41 = 617.10/x
3. Step 3: Cross multiply
   1,590.72x = 2,386.41 × 617.10
4. Step 4: Simplify right side
   1,590.72x = 1,472,653.61
5. Step 5: Solve for x
   x = 1,472,653.61/1,590.72
6. Step 6: Final answer
   x = 925.78