Finding the Fourth Proportional to 1,077.17, 1,614.18 and 528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.17 : 1,614.18 = 528.72 : x
2. Step 2: Convert to fraction form
   1,077.17/1,614.18 = 528.72/x
3. Step 3: Cross multiply
   1,077.17x = 1,614.18 × 528.72
4. Step 4: Simplify right side
   1,077.17x = 853,449.25
5. Step 5: Solve for x
   x = 853,449.25/1,077.17
6. Step 6: Final answer
   x = 792.31