Finding the Fourth Proportional to 117,961, 162,786.18 and 64,969

Step by Step Solution

1. Step 1: Write the proportion equation
   117,961 : 162,786.18 = 64,969 : x
2. Step 2: Convert to fraction form
   117,961/162,786.18 = 64,969/x
3. Step 3: Cross multiply
   117,961x = 162,786.18 × 64,969
4. Step 4: Simplify right side
   117,961x = 10,576,055,328.42
5. Step 5: Solve for x
   x = 10,576,055,328.42/117,961
6. Step 6: Final answer
   x = 89,657.22