Finding the Fourth Proportional to 1,925.47, 2,656.29 and 1,139.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.47 : 2,656.29 = 1,139.06 : x
2. Step 2: Convert to fraction form
   1,925.47/2,656.29 = 1,139.06/x
3. Step 3: Cross multiply
   1,925.47x = 2,656.29 × 1,139.06
4. Step 4: Simplify right side
   1,925.47x = 3,025,684.60
5. Step 5: Solve for x
   x = 3,025,684.60/1,925.47
6. Step 6: Final answer
   x = 1,571.40