Finding the Fourth Proportional to 1,925.63, 2,657.37 and 1,139.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.63 : 2,657.37 = 1,139.73 : x
2. Step 2: Convert to fraction form
   1,925.63/2,657.37 = 1,139.73/x
3. Step 3: Cross multiply
   1,925.63x = 2,657.37 × 1,139.73
4. Step 4: Simplify right side
   1,925.63x = 3,028,684.31
5. Step 5: Solve for x
   x = 3,028,684.31/1,925.63
6. Step 6: Final answer
   x = 1,572.83