Finding the Fourth Proportional to 42,083.20, 63,113.84 and 12,494.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,083.20 : 63,113.84 = 12,494.32 : x
2. Step 2: Convert to fraction form
   42,083.20/63,113.84 = 12,494.32/x
3. Step 3: Cross multiply
   42,083.20x = 63,113.84 × 12,494.32
4. Step 4: Simplify right side
   42,083.20x = 788,564,513.39
5. Step 5: Solve for x
   x = 788,564,513.39/42,083.20
6. Step 6: Final answer
   x = 18,738.23