Finding the Fourth Proportional to 12,209,711.56, 18,314,377.78 and 4,128,362.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209,711.56 : 18,314,377.78 = 4,128,362.62 : x
2. Step 2: Convert to fraction form
   12,209,711.56/18,314,377.78 = 4,128,362.62/x
3. Step 3: Cross multiply
   12,209,711.56x = 18,314,377.78 × 4,128,362.62
4. Step 4: Simplify right side
   12,209,711.56x = 75,608,392,635,510.59
5. Step 5: Solve for x
   x = 75,608,392,635,510.59/12,209,711.56
6. Step 6: Final answer
   x = 6,192,479.84