Finding the Fourth Proportional to 1,925.31, 2,657.04 and 1,139.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.31 : 2,657.04 = 1,139.34 : x
2. Step 2: Convert to fraction form
   1,925.31/2,657.04 = 1,139.34/x
3. Step 3: Cross multiply
   1,925.31x = 2,657.04 × 1,139.34
4. Step 4: Simplify right side
   1,925.31x = 3,027,271.95
5. Step 5: Solve for x
   x = 3,027,271.95/1,925.31
6. Step 6: Final answer
   x = 1,572.36