Finding the Fourth Proportional to 196,026.89, 270,475.86 and 128,143.32

Step by Step Solution

1. Step 1: Write the proportion equation
   196,026.89 : 270,475.86 = 128,143.32 : x
2. Step 2: Convert to fraction form
   196,026.89/270,475.86 = 128,143.32/x
3. Step 3: Cross multiply
   196,026.89x = 270,475.86 × 128,143.32
4. Step 4: Simplify right side
   196,026.89x = 34,659,673,425.70
5. Step 5: Solve for x
   x = 34,659,673,425.70/196,026.89
6. Step 6: Final answer
   x = 176,810.82