Finding the Fourth Proportional to 42,088.20, 63,142.18 and 12,506.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,088.20 : 63,142.18 = 12,506.28 : x
2. Step 2: Convert to fraction form
   42,088.20/63,142.18 = 12,506.28/x
3. Step 3: Cross multiply
   42,088.20x = 63,142.18 × 12,506.28
4. Step 4: Simplify right side
   42,088.20x = 789,673,782.89
5. Step 5: Solve for x
   x = 789,673,782.89/42,088.20
6. Step 6: Final answer
   x = 18,762.36