Finding the Fourth Proportional to 108,859.76, 150,225.15 and 61,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   108,859.76 : 150,225.15 = 61,111.88 : x
2. Step 2: Convert to fraction form
   108,859.76/150,225.15 = 61,111.88/x
3. Step 3: Cross multiply
   108,859.76x = 150,225.15 × 61,111.88
4. Step 4: Simplify right side
   108,859.76x = 9,180,541,339.78
5. Step 5: Solve for x
   x = 9,180,541,339.78/108,859.76
6. Step 6: Final answer
   x = 84,333.65