Finding the Fourth Proportional to 42,671.90, 64,016.06 and 13,084.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,671.90 : 64,016.06 = 13,084.56 : x
2. Step 2: Convert to fraction form
   42,671.90/64,016.06 = 13,084.56/x
3. Step 3: Cross multiply
   42,671.90x = 64,016.06 × 13,084.56
4. Step 4: Simplify right side
   42,671.90x = 837,621,912.61
5. Step 5: Solve for x
   x = 837,621,912.61/42,671.90
6. Step 6: Final answer
   x = 19,629.35