Finding the Fourth Proportional to 112,978.41, 155,924.04 and 65,231.69

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978.41 : 155,924.04 = 65,231.69 : x
2. Step 2: Convert to fraction form
   112,978.41/155,924.04 = 65,231.69/x
3. Step 3: Cross multiply
   112,978.41x = 155,924.04 × 65,231.69
4. Step 4: Simplify right side
   112,978.41x = 10,171,187,861.21
5. Step 5: Solve for x
   x = 10,171,187,861.21/112,978.41
6. Step 6: Final answer
   x = 90,027.71