Finding the Fourth Proportional to 2,114,067.20, 3,171,088.96 and 516,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114,067.20 : 3,171,088.96 = 516,638.72 : x
2. Step 2: Convert to fraction form
   2,114,067.20/3,171,088.96 = 516,638.72/x
3. Step 3: Cross multiply
   2,114,067.20x = 3,171,088.96 × 516,638.72
4. Step 4: Simplify right side
   2,114,067.20x = 1,638,307,341,300.53
5. Step 5: Solve for x
   x = 1,638,307,341,300.53/2,114,067.20
6. Step 6: Final answer
   x = 774,955.19