Finding the Fourth Proportional to 1,761.06, 2,638.86 and 1,298.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.06 : 2,638.86 = 1,298.16 : x
2. Step 2: Convert to fraction form
   1,761.06/2,638.86 = 1,298.16/x
3. Step 3: Cross multiply
   1,761.06x = 2,638.86 × 1,298.16
4. Step 4: Simplify right side
   1,761.06x = 3,425,662.50
5. Step 5: Solve for x
   x = 3,425,662.50/1,761.06
6. Step 6: Final answer
   x = 1,945.23