Finding the Fourth Proportional to 42,663.32, 63,997.47 and 13,081.44

Step by Step Solution

1. Step 1: Write the proportion equation
   42,663.32 : 63,997.47 = 13,081.44 : x
2. Step 2: Convert to fraction form
   42,663.32/63,997.47 = 13,081.44/x
3. Step 3: Cross multiply
   42,663.32x = 63,997.47 × 13,081.44
4. Step 4: Simplify right side
   42,663.32x = 837,179,063.96
5. Step 5: Solve for x
   x = 837,179,063.96/42,663.32
6. Step 6: Final answer
   x = 19,622.93