Finding the Fourth Proportional to 1,470.03, 2,028.48 and 840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,470.03 : 2,028.48 = 840.72 : x
2. Step 2: Convert to fraction form
   1,470.03/2,028.48 = 840.72/x
3. Step 3: Cross multiply
   1,470.03x = 2,028.48 × 840.72
4. Step 4: Simplify right side
   1,470.03x = 1,705,383.71
5. Step 5: Solve for x
   x = 1,705,383.71/1,470.03
6. Step 6: Final answer
   x = 1,160.10