Finding the Fourth Proportional to 172,212.47, 258,321.34 and 65,602.35

Step by Step Solution

1. Step 1: Write the proportion equation
   172,212.47 : 258,321.34 = 65,602.35 : x
2. Step 2: Convert to fraction form
   172,212.47/258,321.34 = 65,602.35/x
3. Step 3: Cross multiply
   172,212.47x = 258,321.34 × 65,602.35
4. Step 4: Simplify right side
   172,212.47x = 16,946,485,667.54
5. Step 5: Solve for x
   x = 16,946,485,667.54/172,212.47
6. Step 6: Final answer
   x = 98,404.52