Finding the Fourth Proportional to 59,671.72, 89,497.86 and 18,109

Step by Step Solution

1. Step 1: Write the proportion equation
   59,671.72 : 89,497.86 = 18,109 : x
2. Step 2: Convert to fraction form
   59,671.72/89,497.86 = 18,109/x
3. Step 3: Cross multiply
   59,671.72x = 89,497.86 × 18,109
4. Step 4: Simplify right side
   59,671.72x = 1,620,716,746.74
5. Step 5: Solve for x
   x = 1,620,716,746.74/59,671.72
6. Step 6: Final answer
   x = 27,160.55