Finding the Fourth Proportional to 111,908.10, 168,056.55 and 59,420.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111,908.10 : 168,056.55 = 59,420.10 : x
2. Step 2: Convert to fraction form
   111,908.10/168,056.55 = 59,420.10/x
3. Step 3: Cross multiply
   111,908.10x = 168,056.55 × 59,420.10
4. Step 4: Simplify right side
   111,908.10x = 9,985,937,006.66
5. Step 5: Solve for x
   x = 9,985,937,006.66/111,908.10
6. Step 6: Final answer
   x = 89,233.37