Finding the Fourth Proportional to 1,470.17, 2,028.80 and 807.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,470.17 : 2,028.80 = 807.10 : x
2. Step 2: Convert to fraction form
   1,470.17/2,028.80 = 807.10/x
3. Step 3: Cross multiply
   1,470.17x = 2,028.80 × 807.10
4. Step 4: Simplify right side
   1,470.17x = 1,637,441.43
5. Step 5: Solve for x
   x = 1,637,441.43/1,470.17
6. Step 6: Final answer
   x = 1,113.78