Finding the Fourth Proportional to 42,086.64, 63,130.14 and 12,504.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,086.64 : 63,130.14 = 12,504.75 : x
2. Step 2: Convert to fraction form
   42,086.64/63,130.14 = 12,504.75/x
3. Step 3: Cross multiply
   42,086.64x = 63,130.14 × 12,504.75
4. Step 4: Simplify right side
   42,086.64x = 789,426,618.17
5. Step 5: Solve for x
   x = 789,426,618.17/42,086.64
6. Step 6: Final answer
   x = 18,757.18