Finding the Fourth Proportional to 128,775.51, 193,123.71 and 89,049.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,775.51 : 193,123.71 = 89,049.72 : x
2. Step 2: Convert to fraction form
   128,775.51/193,123.71 = 89,049.72/x
3. Step 3: Cross multiply
   128,775.51x = 193,123.71 × 89,049.72
4. Step 4: Simplify right side
   128,775.51x = 17,197,612,300.86
5. Step 5: Solve for x
   x = 17,197,612,300.86/128,775.51
6. Step 6: Final answer
   x = 133,547.23