Finding the Fourth Proportional to 42,404.09, 63,607.14 and 12,821.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,404.09 : 63,607.14 = 12,821.81 : x
2. Step 2: Convert to fraction form
   42,404.09/63,607.14 = 12,821.81/x
3. Step 3: Cross multiply
   42,404.09x = 63,607.14 × 12,821.81
4. Step 4: Simplify right side
   42,404.09x = 815,558,663.72
5. Step 5: Solve for x
   x = 815,558,663.72/42,404.09
6. Step 6: Final answer
   x = 19,233.02