Finding the Fourth Proportional to 2,217,086.28, 3,325,691.34 and 721,178.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217,086.28 : 3,325,691.34 = 721,178.28 : x
2. Step 2: Convert to fraction form
   2,217,086.28/3,325,691.34 = 721,178.28/x
3. Step 3: Cross multiply
   2,217,086.28x = 3,325,691.34 × 721,178.28
4. Step 4: Simplify right side
   2,217,086.28x = 2,398,416,360,392.10
5. Step 5: Solve for x
   x = 2,398,416,360,392.10/2,217,086.28
6. Step 6: Final answer
   x = 1,081,787.56