Finding the Fourth Proportional to 1,939.06, 2,905.89 and 1,116.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939.06 : 2,905.89 = 1,116.24 : x
2. Step 2: Convert to fraction form
   1,939.06/2,905.89 = 1,116.24/x
3. Step 3: Cross multiply
   1,939.06x = 2,905.89 × 1,116.24
4. Step 4: Simplify right side
   1,939.06x = 3,243,670.65
5. Step 5: Solve for x
   x = 3,243,670.65/1,939.06
6. Step 6: Final answer
   x = 1,672.81