Finding the Fourth Proportional to 1,648.45, 2,470.51 and 783.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.45 : 2,470.51 = 783.01 : x
2. Step 2: Convert to fraction form
   1,648.45/2,470.51 = 783.01/x
3. Step 3: Cross multiply
   1,648.45x = 2,470.51 × 783.01
4. Step 4: Simplify right side
   1,648.45x = 1,934,434.04
5. Step 5: Solve for x
   x = 1,934,434.04/1,648.45
6. Step 6: Final answer
   x = 1,173.49