Finding the Fourth Proportional to 42,160.29, 63,221.59 and 12,570.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,160.29 : 63,221.59 = 12,570.18 : x
2. Step 2: Convert to fraction form
   42,160.29/63,221.59 = 12,570.18/x
3. Step 3: Cross multiply
   42,160.29x = 63,221.59 × 12,570.18
4. Step 4: Simplify right side
   42,160.29x = 794,706,766.19
5. Step 5: Solve for x
   x = 794,706,766.19/42,160.29
6. Step 6: Final answer
   x = 18,849.65