Finding the Fourth Proportional to 2,656.95, 3,987.23 and 925.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,656.95 : 3,987.23 = 925.57 : x
2. Step 2: Convert to fraction form
   2,656.95/3,987.23 = 925.57/x
3. Step 3: Cross multiply
   2,656.95x = 3,987.23 × 925.57
4. Step 4: Simplify right side
   2,656.95x = 3,690,460.47
5. Step 5: Solve for x
   x = 3,690,460.47/2,656.95
6. Step 6: Final answer
   x = 1,388.98