Finding the Fourth Proportional to 31,779.47, 43,855.55 and 17,439.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,779.47 : 43,855.55 = 17,439.54 : x
2. Step 2: Convert to fraction form
   31,779.47/43,855.55 = 17,439.54/x
3. Step 3: Cross multiply
   31,779.47x = 43,855.55 × 17,439.54
4. Step 4: Simplify right side
   31,779.47x = 764,820,531.25
5. Step 5: Solve for x
   x = 764,820,531.25/31,779.47
6. Step 6: Final answer
   x = 24,066.50