Finding the Fourth Proportional to 120,088.03, 165,722.01 and 65,641.31

Step by Step Solution

1. Step 1: Write the proportion equation
   120,088.03 : 165,722.01 = 65,641.31 : x
2. Step 2: Convert to fraction form
   120,088.03/165,722.01 = 65,641.31/x
3. Step 3: Cross multiply
   120,088.03x = 165,722.01 × 65,641.31
4. Step 4: Simplify right side
   120,088.03x = 10,878,209,832.23
5. Step 5: Solve for x
   x = 10,878,209,832.23/120,088.03
6. Step 6: Final answer
   x = 90,585.30