Finding the Fourth Proportional to 123,931.78, 171,011.98 and 70,205.29

Step by Step Solution

1. Step 1: Write the proportion equation
   123,931.78 : 171,011.98 = 70,205.29 : x
2. Step 2: Convert to fraction form
   123,931.78/171,011.98 = 70,205.29/x
3. Step 3: Cross multiply
   123,931.78x = 171,011.98 × 70,205.29
4. Step 4: Simplify right side
   123,931.78x = 12,005,945,298.35
5. Step 5: Solve for x
   x = 12,005,945,298.35/123,931.78
6. Step 6: Final answer
   x = 96,875.44