Finding the Fourth Proportional to 31,376.71, 46,947.42 and 18,680.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,376.71 : 46,947.42 = 18,680.02 : x
2. Step 2: Convert to fraction form
   31,376.71/46,947.42 = 18,680.02/x
3. Step 3: Cross multiply
   31,376.71x = 46,947.42 × 18,680.02
4. Step 4: Simplify right side
   31,376.71x = 876,978,627.18
5. Step 5: Solve for x
   x = 876,978,627.18/31,376.71
6. Step 6: Final answer
   x = 27,949.99