Finding the Fourth Proportional to 118,013.38, 162,856.41 and 64,298.78

Step by Step Solution

1. Step 1: Write the proportion equation
   118,013.38 : 162,856.41 = 64,298.78 : x
2. Step 2: Convert to fraction form
   118,013.38/162,856.41 = 64,298.78/x
3. Step 3: Cross multiply
   118,013.38x = 162,856.41 × 64,298.78
4. Step 4: Simplify right side
   118,013.38x = 10,471,468,156.69
5. Step 5: Solve for x
   x = 10,471,468,156.69/118,013.38
6. Step 6: Final answer
   x = 88,731.20