Finding the Fourth Proportional to 1,116.81, 1,541.20 and 651.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.81 : 1,541.20 = 651.15 : x
2. Step 2: Convert to fraction form
   1,116.81/1,541.20 = 651.15/x
3. Step 3: Cross multiply
   1,116.81x = 1,541.20 × 651.15
4. Step 4: Simplify right side
   1,116.81x = 1,003,557.86
5. Step 5: Solve for x
   x = 1,003,557.86/1,116.81
6. Step 6: Final answer
   x = 898.59