Finding the Fourth Proportional to 65,178.78, 89,900.24 and 59,818.49

Step by Step Solution

1. Step 1: Write the proportion equation
   65,178.78 : 89,900.24 = 59,818.49 : x
2. Step 2: Convert to fraction form
   65,178.78/89,900.24 = 59,818.49/x
3. Step 3: Cross multiply
   65,178.78x = 89,900.24 × 59,818.49
4. Step 4: Simplify right side
   65,178.78x = 5,377,695,858.84
5. Step 5: Solve for x
   x = 5,377,695,858.84/65,178.78
6. Step 6: Final answer
   x = 82,506.86