Finding the Fourth Proportional to 111,878.96, 154,384.37 and 71,040.08

Step by Step Solution

1. Step 1: Write the proportion equation
   111,878.96 : 154,384.37 = 71,040.08 : x
2. Step 2: Convert to fraction form
   111,878.96/154,384.37 = 71,040.08/x
3. Step 3: Cross multiply
   111,878.96x = 154,384.37 × 71,040.08
4. Step 4: Simplify right side
   111,878.96x = 10,967,477,995.55
5. Step 5: Solve for x
   x = 10,967,477,995.55/111,878.96
6. Step 6: Final answer
   x = 98,029.85