Finding the Fourth Proportional to 80,870.69, 121,041.45 and 59,517.68

Step by Step Solution

1. Step 1: Write the proportion equation
   80,870.69 : 121,041.45 = 59,517.68 : x
2. Step 2: Convert to fraction form
   80,870.69/121,041.45 = 59,517.68/x
3. Step 3: Cross multiply
   80,870.69x = 121,041.45 × 59,517.68
4. Step 4: Simplify right side
   80,870.69x = 7,204,105,682.63
5. Step 5: Solve for x
   x = 7,204,105,682.63/80,870.69
6. Step 6: Final answer
   x = 89,081.79