Finding the Fourth Proportional to 117,857.67, 162,640.47 and 64,141.55

Step by Step Solution

1. Step 1: Write the proportion equation
   117,857.67 : 162,640.47 = 64,141.55 : x
2. Step 2: Convert to fraction form
   117,857.67/162,640.47 = 64,141.55/x
3. Step 3: Cross multiply
   117,857.67x = 162,640.47 × 64,141.55
4. Step 4: Simplify right side
   117,857.67x = 10,432,011,025.33
5. Step 5: Solve for x
   x = 10,432,011,025.33/117,857.67
6. Step 6: Final answer
   x = 88,513.64