Finding the Fourth Proportional to 42,808.41, 64,215.69 and 13,222.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,808.41 : 64,215.69 = 13,222.41 : x
2. Step 2: Convert to fraction form
   42,808.41/64,215.69 = 13,222.41/x
3. Step 3: Cross multiply
   42,808.41x = 64,215.69 × 13,222.41
4. Step 4: Simplify right side
   42,808.41x = 849,086,181.61
5. Step 5: Solve for x
   x = 849,086,181.61/42,808.41
6. Step 6: Final answer
   x = 19,834.56