Finding the Fourth Proportional to 1,258.72, 1,886.15 and 527.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258.72 : 1,886.15 = 527.89 : x
2. Step 2: Convert to fraction form
   1,258.72/1,886.15 = 527.89/x
3. Step 3: Cross multiply
   1,258.72x = 1,886.15 × 527.89
4. Step 4: Simplify right side
   1,258.72x = 995,679.72
5. Step 5: Solve for x
   x = 995,679.72/1,258.72
6. Step 6: Final answer
   x = 791.03