Finding the Fourth Proportional to 1,116.72, 1,541.02 and 619.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.72 : 1,541.02 = 619.32 : x
2. Step 2: Convert to fraction form
   1,116.72/1,541.02 = 619.32/x
3. Step 3: Cross multiply
   1,116.72x = 1,541.02 × 619.32
4. Step 4: Simplify right side
   1,116.72x = 954,384.51
5. Step 5: Solve for x
   x = 954,384.51/1,116.72
6. Step 6: Final answer
   x = 854.63