Finding the Fourth Proportional to 117,172.67, 161,686.71 and 65,480.22

Step by Step Solution

1. Step 1: Write the proportion equation
   117,172.67 : 161,686.71 = 65,480.22 : x
2. Step 2: Convert to fraction form
   117,172.67/161,686.71 = 65,480.22/x
3. Step 3: Cross multiply
   117,172.67x = 161,686.71 × 65,480.22
4. Step 4: Simplify right side
   117,172.67x = 10,587,281,341.88
5. Step 5: Solve for x
   x = 10,587,281,341.88/117,172.67
6. Step 6: Final answer
   x = 90,356.24