Finding the Fourth Proportional to 120,091.99, 165,724.06 and 65,641.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,091.99 : 165,724.06 = 65,641.72 : x
2. Step 2: Convert to fraction form
   120,091.99/165,724.06 = 65,641.72/x
3. Step 3: Cross multiply
   120,091.99x = 165,724.06 × 65,641.72
4. Step 4: Simplify right side
   120,091.99x = 10,878,413,058.73
5. Step 5: Solve for x
   x = 10,878,413,058.73/120,091.99
6. Step 6: Final answer
   x = 90,584.01