Finding the Fourth Proportional to 31,690.86, 43,738 and 18,259.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,690.86 : 43,738 = 18,259.52 : x
2. Step 2: Convert to fraction form
   31,690.86/43,738 = 18,259.52/x
3. Step 3: Cross multiply
   31,690.86x = 43,738 × 18,259.52
4. Step 4: Simplify right side
   31,690.86x = 798,634,885.76
5. Step 5: Solve for x
   x = 798,634,885.76/31,690.86
6. Step 6: Final answer
   x = 25,200.80