Finding the Fourth Proportional to 120,088.53, 165,722.70 and 65,641.81

Step by Step Solution

1. Step 1: Write the proportion equation
   120,088.53 : 165,722.70 = 65,641.81 : x
2. Step 2: Convert to fraction form
   120,088.53/165,722.70 = 65,641.81/x
3. Step 3: Cross multiply
   120,088.53x = 165,722.70 × 65,641.81
4. Step 4: Simplify right side
   120,088.53x = 10,878,337,986.09
5. Step 5: Solve for x
   x = 10,878,337,986.09/120,088.53
6. Step 6: Final answer
   x = 90,585.99