Finding the Fourth Proportional to 68,290.56, 102,435.62 and 31,771.89

Step by Step Solution

1. Step 1: Write the proportion equation
   68,290.56 : 102,435.62 = 31,771.89 : x
2. Step 2: Convert to fraction form
   68,290.56/102,435.62 = 31,771.89/x
3. Step 3: Cross multiply
   68,290.56x = 102,435.62 × 31,771.89
4. Step 4: Simplify right side
   68,290.56x = 3,254,573,091.86
5. Step 5: Solve for x
   x = 3,254,573,091.86/68,290.56
6. Step 6: Final answer
   x = 47,657.73