Finding the Fourth Proportional to 2,138,561.32, 3,207,814.28 and 519,343.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138,561.32 : 3,207,814.28 = 519,343.42 : x
2. Step 2: Convert to fraction form
   2,138,561.32/3,207,814.28 = 519,343.42/x
3. Step 3: Cross multiply
   2,138,561.32x = 3,207,814.28 × 519,343.42
4. Step 4: Simplify right side
   2,138,561.32x = 1,665,957,238,900.04
5. Step 5: Solve for x
   x = 1,665,957,238,900.04/2,138,561.32
6. Step 6: Final answer
   x = 779,008.40