Finding the Fourth Proportional to 1,925.16, 2,656.56 and 1,139.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.16 : 2,656.56 = 1,139.07 : x
2. Step 2: Convert to fraction form
   1,925.16/2,656.56 = 1,139.07/x
3. Step 3: Cross multiply
   1,925.16x = 2,656.56 × 1,139.07
4. Step 4: Simplify right side
   1,925.16x = 3,026,007.80
5. Step 5: Solve for x
   x = 3,026,007.80/1,925.16
6. Step 6: Final answer
   x = 1,571.82