Finding the Fourth Proportional to 31,147.13, 42,976.47 and 19,812.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,147.13 : 42,976.47 = 19,812.50 : x
2. Step 2: Convert to fraction form
   31,147.13/42,976.47 = 19,812.50/x
3. Step 3: Cross multiply
   31,147.13x = 42,976.47 × 19,812.50
4. Step 4: Simplify right side
   31,147.13x = 851,471,311.88
5. Step 5: Solve for x
   x = 851,471,311.88/31,147.13
6. Step 6: Final answer
   x = 27,337.07