Finding the Fourth Proportional to 85,881.72, 118,517.94 and 64,333.29

Step by Step Solution

1. Step 1: Write the proportion equation
   85,881.72 : 118,517.94 = 64,333.29 : x
2. Step 2: Convert to fraction form
   85,881.72/118,517.94 = 64,333.29/x
3. Step 3: Cross multiply
   85,881.72x = 118,517.94 × 64,333.29
4. Step 4: Simplify right side
   85,881.72x = 7,624,649,004.22
5. Step 5: Solve for x
   x = 7,624,649,004.22/85,881.72
6. Step 6: Final answer
   x = 88,780.81