Finding the Fourth Proportional to 31,451,724.72, 43,416,772.20 and 21,144,426.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,451,724.72 : 43,416,772.20 = 21,144,426.48 : x
2. Step 2: Convert to fraction form
   31,451,724.72/43,416,772.20 = 21,144,426.48/x
3. Step 3: Cross multiply
   31,451,724.72x = 43,416,772.20 × 21,144,426.48
4. Step 4: Simplify right side
   31,451,724.72x = 918,022,747,781,808
5. Step 5: Solve for x
   x = 918,022,747,781,808/31,451,724.72
6. Step 6: Final answer
   x = 29,188,311.80