Finding the Fourth Proportional to 1,116.89, 1,541.30 and 619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.89 : 1,541.30 = 619.50 : x
2. Step 2: Convert to fraction form
   1,116.89/1,541.30 = 619.50/x
3. Step 3: Cross multiply
   1,116.89x = 1,541.30 × 619.50
4. Step 4: Simplify right side
   1,116.89x = 954,832.25
5. Step 5: Solve for x
   x = 954,832.25/1,116.89
6. Step 6: Final answer
   x = 854.91