Finding the Fourth Proportional to 42,649.43, 63,985.82 and 13,066.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,649.43 : 63,985.82 = 13,066.61 : x
2. Step 2: Convert to fraction form
   42,649.43/63,985.82 = 13,066.61/x
3. Step 3: Cross multiply
   42,649.43x = 63,985.82 × 13,066.61
4. Step 4: Simplify right side
   42,649.43x = 836,077,370.21
5. Step 5: Solve for x
   x = 836,077,370.21/42,649.43
6. Step 6: Final answer
   x = 19,603.49