Finding the Fourth Proportional to 2,178, 3,005.91 and 1,246.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178 : 3,005.91 = 1,246.50 : x
2. Step 2: Convert to fraction form
   2,178/3,005.91 = 1,246.50/x
3. Step 3: Cross multiply
   2,178x = 3,005.91 × 1,246.50
4. Step 4: Simplify right side
   2,178x = 3,746,866.82
5. Step 5: Solve for x
   x = 3,746,866.82/2,178
6. Step 6: Final answer
   x = 1,720.32