Finding the Fourth Proportional to 1,083.64, 1,495.18 and 617.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.64 : 1,495.18 = 617.72 : x
2. Step 2: Convert to fraction form
   1,083.64/1,495.18 = 617.72/x
3. Step 3: Cross multiply
   1,083.64x = 1,495.18 × 617.72
4. Step 4: Simplify right side
   1,083.64x = 923,602.59
5. Step 5: Solve for x
   x = 923,602.59/1,083.64
6. Step 6: Final answer
   x = 852.31