Finding the Fourth Proportional to 21,309,380.18, 29,399,748.90 and 12,135,527.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,309,380.18 : 29,399,748.90 = 12,135,527.54 : x
2. Step 2: Convert to fraction form
   21,309,380.18/29,399,748.90 = 12,135,527.54/x
3. Step 3: Cross multiply
   21,309,380.18x = 29,399,748.90 × 12,135,527.54
4. Step 4: Simplify right side
   21,309,380.18x = 356,781,462,445,034.69
5. Step 5: Solve for x
   x = 356,781,462,445,034.69/21,309,380.18
6. Step 6: Final answer
   x = 16,742,930.08