Finding the Fourth Proportional to 31,014.22, 42,784.59 and 18,430.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,014.22 : 42,784.59 = 18,430.06 : x
2. Step 2: Convert to fraction form
   31,014.22/42,784.59 = 18,430.06/x
3. Step 3: Cross multiply
   31,014.22x = 42,784.59 × 18,430.06
4. Step 4: Simplify right side
   31,014.22x = 788,522,560.78
5. Step 5: Solve for x
   x = 788,522,560.78/31,014.22
6. Step 6: Final answer
   x = 25,424.55