Finding the Fourth Proportional to 42,015.59, 63,016.90 and 18,637.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,015.59 : 63,016.90 = 18,637.91 : x
2. Step 2: Convert to fraction form
   42,015.59/63,016.90 = 18,637.91/x
3. Step 3: Cross multiply
   42,015.59x = 63,016.90 × 18,637.91
4. Step 4: Simplify right side
   42,015.59x = 1,174,503,310.68
5. Step 5: Solve for x
   x = 1,174,503,310.68/42,015.59
6. Step 6: Final answer
   x = 27,953.99