Finding the Fourth Proportional to 1,459.72, 2,013.64 and 870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,459.72 : 2,013.64 = 870.16 : x
2. Step 2: Convert to fraction form
   1,459.72/2,013.64 = 870.16/x
3. Step 3: Cross multiply
   1,459.72x = 2,013.64 × 870.16
4. Step 4: Simplify right side
   1,459.72x = 1,752,188.98
5. Step 5: Solve for x
   x = 1,752,188.98/1,459.72
6. Step 6: Final answer
   x = 1,200.36