Finding the Fourth Proportional to 21,856,505.94, 30,164,623.06 and 12,439,586.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,856,505.94 : 30,164,623.06 = 12,439,586.50 : x
2. Step 2: Convert to fraction form
   21,856,505.94/30,164,623.06 = 12,439,586.50/x
3. Step 3: Cross multiply
   21,856,505.94x = 30,164,623.06 × 12,439,586.50
4. Step 4: Simplify right side
   21,856,505.94x = 375,235,437,794,764.69
5. Step 5: Solve for x
   x = 375,235,437,794,764.69/21,856,505.94
6. Step 6: Final answer
   x = 17,168,134.69