Finding the Fourth Proportional to 31,059.94, 42,861.55 and 18,980.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.94 : 42,861.55 = 18,980.62 : x
2. Step 2: Convert to fraction form
   31,059.94/42,861.55 = 18,980.62/x
3. Step 3: Cross multiply
   31,059.94x = 42,861.55 × 18,980.62
4. Step 4: Simplify right side
   31,059.94x = 813,538,698.26
5. Step 5: Solve for x
   x = 813,538,698.26/31,059.94
6. Step 6: Final answer
   x = 26,192.54