Finding the Fourth Proportional to 31,491, 43,453.80 and 18,061.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,491 : 43,453.80 = 18,061.56 : x
2. Step 2: Convert to fraction form
   31,491/43,453.80 = 18,061.56/x
3. Step 3: Cross multiply
   31,491x = 43,453.80 × 18,061.56
4. Step 4: Simplify right side
   31,491x = 784,843,415.93
5. Step 5: Solve for x
   x = 784,843,415.93/31,491
6. Step 6: Final answer
   x = 24,922.78