Finding the Fourth Proportional to 89,479.10, 133,926.59 and 65,780.37

Step by Step Solution

1. Step 1: Write the proportion equation
   89,479.10 : 133,926.59 = 65,780.37 : x
2. Step 2: Convert to fraction form
   89,479.10/133,926.59 = 65,780.37/x
3. Step 3: Cross multiply
   89,479.10x = 133,926.59 × 65,780.37
4. Step 4: Simplify right side
   89,479.10x = 8,809,740,807.49
5. Step 5: Solve for x
   x = 8,809,740,807.49/89,479.10
6. Step 6: Final answer
   x = 98,455.85