Finding the Fourth Proportional to 12,875.24, 19,314.84 and 5,477.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.24 : 19,314.84 = 5,477.72 : x
2. Step 2: Convert to fraction form
   12,875.24/19,314.84 = 5,477.72/x
3. Step 3: Cross multiply
   12,875.24x = 19,314.84 × 5,477.72
4. Step 4: Simplify right side
   12,875.24x = 105,801,285.36
5. Step 5: Solve for x
   x = 105,801,285.36/12,875.24
6. Step 6: Final answer
   x = 8,217.42