Finding the Fourth Proportional to 108,978.10, 150,389.92 and 61,231.42

Step by Step Solution

1. Step 1: Write the proportion equation
   108,978.10 : 150,389.92 = 61,231.42 : x
2. Step 2: Convert to fraction form
   108,978.10/150,389.92 = 61,231.42/x
3. Step 3: Cross multiply
   108,978.10x = 150,389.92 × 61,231.42
4. Step 4: Simplify right side
   108,978.10x = 9,208,588,355.29
5. Step 5: Solve for x
   x = 9,208,588,355.29/108,978.10
6. Step 6: Final answer
   x = 84,499.44