Finding the Fourth Proportional to 1,258.55, 1,736.59 and 761.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.55 : 1,736.59 = 761.17 : x
2. Step 2: Convert to fraction form
   1,258.55/1,736.59 = 761.17/x
3. Step 3: Cross multiply
   1,258.55x = 1,736.59 × 761.17
4. Step 4: Simplify right side
   1,258.55x = 1,321,827.72
5. Step 5: Solve for x
   x = 1,321,827.72/1,258.55
6. Step 6: Final answer
   x = 1,050.28