Finding the Fourth Proportional to 117,889.37, 162,687.34 and 64,174.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,889.37 : 162,687.34 = 64,174.78 : x
2. Step 2: Convert to fraction form
   117,889.37/162,687.34 = 64,174.78/x
3. Step 3: Cross multiply
   117,889.37x = 162,687.34 × 64,174.78
4. Step 4: Simplify right side
   117,889.37x = 10,440,424,536.86
5. Step 5: Solve for x
   x = 10,440,424,536.86/117,889.37
6. Step 6: Final answer
   x = 88,561.20