Finding the Fourth Proportional to 2,139,031.50, 3,208,516.80 and 519,812.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,031.50 : 3,208,516.80 = 519,812.22 : x
2. Step 2: Convert to fraction form
   2,139,031.50/3,208,516.80 = 519,812.22/x
3. Step 3: Cross multiply
   2,139,031.50x = 3,208,516.80 × 519,812.22
4. Step 4: Simplify right side
   2,139,031.50x = 1,667,826,240,715.30
5. Step 5: Solve for x
   x = 1,667,826,240,715.30/2,139,031.50
6. Step 6: Final answer
   x = 779,710.93