Finding the Fourth Proportional to 71,637.72, 107,428.50 and 42,063

Step by Step Solution

1. Step 1: Write the proportion equation
   71,637.72 : 107,428.50 = 42,063 : x
2. Step 2: Convert to fraction form
   71,637.72/107,428.50 = 42,063/x
3. Step 3: Cross multiply
   71,637.72x = 107,428.50 × 42,063
4. Step 4: Simplify right side
   71,637.72x = 4,518,764,995.50
5. Step 5: Solve for x
   x = 4,518,764,995.50/71,637.72
6. Step 6: Final answer
   x = 63,078.01