Finding the Fourth Proportional to 2,178.69, 3,267.91 and 1,345.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.69 : 3,267.91 = 1,345.91 : x
2. Step 2: Convert to fraction form
   2,178.69/3,267.91 = 1,345.91/x
3. Step 3: Cross multiply
   2,178.69x = 3,267.91 × 1,345.91
4. Step 4: Simplify right side
   2,178.69x = 4,398,312.75
5. Step 5: Solve for x
   x = 4,398,312.75/2,178.69
6. Step 6: Final answer
   x = 2,018.79