Finding the Fourth Proportional to 111,171.36, 153,416.16 and 60,870

Step by Step Solution

1. Step 1: Write the proportion equation
   111,171.36 : 153,416.16 = 60,870 : x
2. Step 2: Convert to fraction form
   111,171.36/153,416.16 = 60,870/x
3. Step 3: Cross multiply
   111,171.36x = 153,416.16 × 60,870
4. Step 4: Simplify right side
   111,171.36x = 9,338,441,659.20
5. Step 5: Solve for x
   x = 9,338,441,659.20/111,171.36
6. Step 6: Final answer
   x = 84,000.43