Finding the Fourth Proportional to 160,014.72, 240,091.20 and 89,788.80

Step by Step Solution

1. Step 1: Write the proportion equation
   160,014.72 : 240,091.20 = 89,788.80 : x
2. Step 2: Convert to fraction form
   160,014.72/240,091.20 = 89,788.80/x
3. Step 3: Cross multiply
   160,014.72x = 240,091.20 × 89,788.80
4. Step 4: Simplify right side
   160,014.72x = 21,557,500,738.56
5. Step 5: Solve for x
   x = 21,557,500,738.56/160,014.72
6. Step 6: Final answer
   x = 134,721.99