Finding the Fourth Proportional to 80,880.69, 121,063.61 and 45,233.04

Step by Step Solution

1. Step 1: Write the proportion equation
   80,880.69 : 121,063.61 = 45,233.04 : x
2. Step 2: Convert to fraction form
   80,880.69/121,063.61 = 45,233.04/x
3. Step 3: Cross multiply
   80,880.69x = 121,063.61 × 45,233.04
4. Step 4: Simplify right side
   80,880.69x = 5,476,074,887.51
5. Step 5: Solve for x
   x = 5,476,074,887.51/80,880.69
6. Step 6: Final answer
   x = 67,705.59