Finding the Fourth Proportional to 42,663.90, 64,003.41 and 14,577.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,663.90 : 64,003.41 = 14,577.39 : x
2. Step 2: Convert to fraction form
   42,663.90/64,003.41 = 14,577.39/x
3. Step 3: Cross multiply
   42,663.90x = 64,003.41 × 14,577.39
4. Step 4: Simplify right side
   42,663.90x = 933,002,668.90
5. Step 5: Solve for x
   x = 933,002,668.90/42,663.90
6. Step 6: Final answer
   x = 21,868.67