Finding the Fourth Proportional to 42,046.82, 63,059.48 and 12,457.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,046.82 : 63,059.48 = 12,457.74 : x
2. Step 2: Convert to fraction form
   42,046.82/63,059.48 = 12,457.74/x
3. Step 3: Cross multiply
   42,046.82x = 63,059.48 × 12,457.74
4. Step 4: Simplify right side
   42,046.82x = 785,578,606.38
5. Step 5: Solve for x
   x = 785,578,606.38/42,046.82
6. Step 6: Final answer
   x = 18,683.42