Finding the Fourth Proportional to 42,527.82, 63,787.18 and 12,945.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,527.82 : 63,787.18 = 12,945.91 : x
2. Step 2: Convert to fraction form
   42,527.82/63,787.18 = 12,945.91/x
3. Step 3: Cross multiply
   42,527.82x = 63,787.18 × 12,945.91
4. Step 4: Simplify right side
   42,527.82x = 825,783,091.43
5. Step 5: Solve for x
   x = 825,783,091.43/42,527.82
6. Step 6: Final answer
   x = 19,417.48