Finding the Fourth Proportional to 1,761.55, 2,641.55 and 528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.55 : 2,641.55 = 528.72 : x
2. Step 2: Convert to fraction form
   1,761.55/2,641.55 = 528.72/x
3. Step 3: Cross multiply
   1,761.55x = 2,641.55 × 528.72
4. Step 4: Simplify right side
   1,761.55x = 1,396,627.77
5. Step 5: Solve for x
   x = 1,396,627.77/1,761.55
6. Step 6: Final answer
   x = 792.84