Finding the Fourth Proportional to 1,256.72, 1,883.15 and 525.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.72 : 1,883.15 = 525.89 : x
2. Step 2: Convert to fraction form
   1,256.72/1,883.15 = 525.89/x
3. Step 3: Cross multiply
   1,256.72x = 1,883.15 × 525.89
4. Step 4: Simplify right side
   1,256.72x = 990,333.80
5. Step 5: Solve for x
   x = 990,333.80/1,256.72
6. Step 6: Final answer
   x = 788.03