Finding the Fourth Proportional to 121,945.56, 168,300.30 and 74,196.04

Step by Step Solution

1. Step 1: Write the proportion equation
   121,945.56 : 168,300.30 = 74,196.04 : x
2. Step 2: Convert to fraction form
   121,945.56/168,300.30 = 74,196.04/x
3. Step 3: Cross multiply
   121,945.56x = 168,300.30 × 74,196.04
4. Step 4: Simplify right side
   121,945.56x = 12,487,215,790.81
5. Step 5: Solve for x
   x = 12,487,215,790.81/121,945.56
6. Step 6: Final answer
   x = 102,399.92