Finding the Fourth Proportional to 68,155.98, 102,238.05 and 21,408.86

Step by Step Solution

1. Step 1: Write the proportion equation
   68,155.98 : 102,238.05 = 21,408.86 : x
2. Step 2: Convert to fraction form
   68,155.98/102,238.05 = 21,408.86/x
3. Step 3: Cross multiply
   68,155.98x = 102,238.05 × 21,408.86
4. Step 4: Simplify right side
   68,155.98x = 2,188,799,587.93
5. Step 5: Solve for x
   x = 2,188,799,587.93/68,155.98
6. Step 6: Final answer
   x = 32,114.56