Finding the Fourth Proportional to 1,412.73, 2,116.95 and 864.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.73 : 2,116.95 = 864.15 : x
2. Step 2: Convert to fraction form
   1,412.73/2,116.95 = 864.15/x
3. Step 3: Cross multiply
   1,412.73x = 2,116.95 × 864.15
4. Step 4: Simplify right side
   1,412.73x = 1,829,362.34
5. Step 5: Solve for x
   x = 1,829,362.34/1,412.73
6. Step 6: Final answer
   x = 1,294.91