Finding the Fourth Proportional to 42,525.29, 63,785.59 and 12,940.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,525.29 : 63,785.59 = 12,940.82 : x
2. Step 2: Convert to fraction form
   42,525.29/63,785.59 = 12,940.82/x
3. Step 3: Cross multiply
   42,525.29x = 63,785.59 × 12,940.82
4. Step 4: Simplify right side
   42,525.29x = 825,437,487.50
5. Step 5: Solve for x
   x = 825,437,487.50/42,525.29
6. Step 6: Final answer
   x = 19,410.51