Finding the Fourth Proportional to 1,671.91, 2,308.11 and 1,298.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.91 : 2,308.11 = 1,298.05 : x
2. Step 2: Convert to fraction form
   1,671.91/2,308.11 = 1,298.05/x
3. Step 3: Cross multiply
   1,671.91x = 2,308.11 × 1,298.05
4. Step 4: Simplify right side
   1,671.91x = 2,996,042.19
5. Step 5: Solve for x
   x = 2,996,042.19/1,671.91
6. Step 6: Final answer
   x = 1,791.99