Finding the Fourth Proportional to 42,485.24, 63,723.72 and 12,903.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,485.24 : 63,723.72 = 12,903.32 : x
2. Step 2: Convert to fraction form
   42,485.24/63,723.72 = 12,903.32/x
3. Step 3: Cross multiply
   42,485.24x = 63,723.72 × 12,903.32
4. Step 4: Simplify right side
   42,485.24x = 822,247,550.75
5. Step 5: Solve for x
   x = 822,247,550.75/42,485.24
6. Step 6: Final answer
   x = 19,353.72