Finding the Fourth Proportional to 128,105.82, 176,782.70 and 70,749.32

Step by Step Solution

1. Step 1: Write the proportion equation
   128,105.82 : 176,782.70 = 70,749.32 : x
2. Step 2: Convert to fraction form
   128,105.82/176,782.70 = 70,749.32/x
3. Step 3: Cross multiply
   128,105.82x = 176,782.70 × 70,749.32
4. Step 4: Simplify right side
   128,105.82x = 12,507,255,105.72
5. Step 5: Solve for x
   x = 12,507,255,105.72/128,105.82
6. Step 6: Final answer
   x = 97,632.22