Finding the Fourth Proportional to 1,505.02, 2,258.34 and 1,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,505.02 : 2,258.34 = 1,139.72 : x
2. Step 2: Convert to fraction form
   1,505.02/2,258.34 = 1,139.72/x
3. Step 3: Cross multiply
   1,505.02x = 2,258.34 × 1,139.72
4. Step 4: Simplify right side
   1,505.02x = 2,573,875.26
5. Step 5: Solve for x
   x = 2,573,875.26/1,505.02
6. Step 6: Final answer
   x = 1,710.19