Finding the Fourth Proportional to 1,763.83, 2,646.61 and 1,247.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,763.83 : 2,646.61 = 1,247.15 : x
2. Step 2: Convert to fraction form
   1,763.83/2,646.61 = 1,247.15/x
3. Step 3: Cross multiply
   1,763.83x = 2,646.61 × 1,247.15
4. Step 4: Simplify right side
   1,763.83x = 3,300,719.66
5. Step 5: Solve for x
   x = 3,300,719.66/1,763.83
6. Step 6: Final answer
   x = 1,871.34