Finding the Fourth Proportional to 128,769.51, 193,114.71 and 89,043.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,769.51 : 193,114.71 = 89,043.72 : x
2. Step 2: Convert to fraction form
   128,769.51/193,114.71 = 89,043.72/x
3. Step 3: Cross multiply
   128,769.51x = 193,114.71 × 89,043.72
4. Step 4: Simplify right side
   128,769.51x = 17,195,652,165.12
5. Step 5: Solve for x
   x = 17,195,652,165.12/128,769.51
6. Step 6: Final answer
   x = 133,538.23