Finding the Fourth Proportional to 2,218.81, 3,061.44 and 1,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.81 : 3,061.44 = 1,432.72 : x
2. Step 2: Convert to fraction form
   2,218.81/3,061.44 = 1,432.72/x
3. Step 3: Cross multiply
   2,218.81x = 3,061.44 × 1,432.72
4. Step 4: Simplify right side
   2,218.81x = 4,386,186.32
5. Step 5: Solve for x
   x = 4,386,186.32/2,218.81
6. Step 6: Final answer
   x = 1,976.82