Finding the Fourth Proportional to 85,682.84, 118,404.98 and 64,425.20

Step by Step Solution

1. Step 1: Write the proportion equation
   85,682.84 : 118,404.98 = 64,425.20 : x
2. Step 2: Convert to fraction form
   85,682.84/118,404.98 = 64,425.20/x
3. Step 3: Cross multiply
   85,682.84x = 118,404.98 × 64,425.20
4. Step 4: Simplify right side
   85,682.84x = 7,628,264,517.50
5. Step 5: Solve for x
   x = 7,628,264,517.50/85,682.84
6. Step 6: Final answer
   x = 89,029.08