Finding the Fourth Proportional to 172,097.12, 258,106.69 and 65,443.05

Step by Step Solution

1. Step 1: Write the proportion equation
   172,097.12 : 258,106.69 = 65,443.05 : x
2. Step 2: Convert to fraction form
   172,097.12/258,106.69 = 65,443.05/x
3. Step 3: Cross multiply
   172,097.12x = 258,106.69 × 65,443.05
4. Step 4: Simplify right side
   172,097.12x = 16,891,289,019.00
5. Step 5: Solve for x
   x = 16,891,289,019.00/172,097.12
6. Step 6: Final answer
   x = 98,149.75