Finding the Fourth Proportional to 1,761.89, 2,642.18 and 528.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.89 : 2,642.18 = 528.89 : x
2. Step 2: Convert to fraction form
   1,761.89/2,642.18 = 528.89/x
3. Step 3: Cross multiply
   1,761.89x = 2,642.18 × 528.89
4. Step 4: Simplify right side
   1,761.89x = 1,397,406.72
5. Step 5: Solve for x
   x = 1,397,406.72/1,761.89
6. Step 6: Final answer
   x = 793.13