Finding the Fourth Proportional to 128,111.61, 176,794.94 and 70,749.33

Step by Step Solution

1. Step 1: Write the proportion equation
   128,111.61 : 176,794.94 = 70,749.33 : x
2. Step 2: Convert to fraction form
   128,111.61/176,794.94 = 70,749.33/x
3. Step 3: Cross multiply
   128,111.61x = 176,794.94 × 70,749.33
4. Step 4: Simplify right side
   128,111.61x = 12,508,123,198.64
5. Step 5: Solve for x
   x = 12,508,123,198.64/128,111.61
6. Step 6: Final answer
   x = 97,634.58