Finding the Fourth Proportional to 42,475.59, 63,711.77 and 12,892.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,475.59 : 63,711.77 = 12,892.23 : x
2. Step 2: Convert to fraction form
   42,475.59/63,711.77 = 12,892.23/x
3. Step 3: Cross multiply
   42,475.59x = 63,711.77 × 12,892.23
4. Step 4: Simplify right side
   42,475.59x = 821,386,728.09
5. Step 5: Solve for x
   x = 821,386,728.09/42,475.59
6. Step 6: Final answer
   x = 19,337.85