Finding the Fourth Proportional to 1,116.87, 1,541.29 and 619.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.87 : 1,541.29 = 619.55 : x
2. Step 2: Convert to fraction form
   1,116.87/1,541.29 = 619.55/x
3. Step 3: Cross multiply
   1,116.87x = 1,541.29 × 619.55
4. Step 4: Simplify right side
   1,116.87x = 954,910.83
5. Step 5: Solve for x
   x = 954,910.83/1,116.87
6. Step 6: Final answer
   x = 854.99