Finding the Fourth Proportional to 128,215.98, 176,922.79 and 70,851.83

Step by Step Solution

1. Step 1: Write the proportion equation
   128,215.98 : 176,922.79 = 70,851.83 : x
2. Step 2: Convert to fraction form
   128,215.98/176,922.79 = 70,851.83/x
3. Step 3: Cross multiply
   128,215.98x = 176,922.79 × 70,851.83
4. Step 4: Simplify right side
   128,215.98x = 12,535,302,378.46
5. Step 5: Solve for x
   x = 12,535,302,378.46/128,215.98
6. Step 6: Final answer
   x = 97,767.08