Finding the Fourth Proportional to 119,155.78, 164,434.34 and 64,707.48

Step by Step Solution

1. Step 1: Write the proportion equation
   119,155.78 : 164,434.34 = 64,707.48 : x
2. Step 2: Convert to fraction form
   119,155.78/164,434.34 = 64,707.48/x
3. Step 3: Cross multiply
   119,155.78x = 164,434.34 × 64,707.48
4. Step 4: Simplify right side
   119,155.78x = 10,640,131,928.63
5. Step 5: Solve for x
   x = 10,640,131,928.63/119,155.78
6. Step 6: Final answer
   x = 89,295.98