Finding the Fourth Proportional to 1,478.25, 2,215.62 and 1,065.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.25 : 2,215.62 = 1,065.15 : x
2. Step 2: Convert to fraction form
   1,478.25/2,215.62 = 1,065.15/x
3. Step 3: Cross multiply
   1,478.25x = 2,215.62 × 1,065.15
4. Step 4: Simplify right side
   1,478.25x = 2,359,967.64
5. Step 5: Solve for x
   x = 2,359,967.64/1,478.25
6. Step 6: Final answer
   x = 1,596.46