Finding the Fourth Proportional to 12,947.54, 17,870.50 and 8,463.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947.54 : 17,870.50 = 8,463.58 : x
2. Step 2: Convert to fraction form
   12,947.54/17,870.50 = 8,463.58/x
3. Step 3: Cross multiply
   12,947.54x = 17,870.50 × 8,463.58
4. Step 4: Simplify right side
   12,947.54x = 151,248,406.39
5. Step 5: Solve for x
   x = 151,248,406.39/12,947.54
6. Step 6: Final answer
   x = 11,681.63