Finding the Fourth Proportional to 30,931.71, 42,686.58 and 16,784.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,931.71 : 42,686.58 = 16,784.56 : x
2. Step 2: Convert to fraction form
   30,931.71/42,686.58 = 16,784.56/x
3. Step 3: Cross multiply
   30,931.71x = 42,686.58 × 16,784.56
4. Step 4: Simplify right side
   30,931.71x = 716,475,463.20
5. Step 5: Solve for x
   x = 716,475,463.20/30,931.71
6. Step 6: Final answer
   x = 23,163.14