Finding the Fourth Proportional to 31,685.87, 43,718.72 and 19,417.92

Step by Step Solution

1. Step 1: Write the proportion equation
   31,685.87 : 43,718.72 = 19,417.92 : x
2. Step 2: Convert to fraction form
   31,685.87/43,718.72 = 19,417.92/x
3. Step 3: Cross multiply
   31,685.87x = 43,718.72 × 19,417.92
4. Step 4: Simplify right side
   31,685.87x = 848,926,510.37
5. Step 5: Solve for x
   x = 848,926,510.37/31,685.87
6. Step 6: Final answer
   x = 26,791.96