Finding the Fourth Proportional to 71,837.56, 107,742.52 and 42,220.80

Step by Step Solution

1. Step 1: Write the proportion equation
   71,837.56 : 107,742.52 = 42,220.80 : x
2. Step 2: Convert to fraction form
   71,837.56/107,742.52 = 42,220.80/x
3. Step 3: Cross multiply
   71,837.56x = 107,742.52 × 42,220.80
4. Step 4: Simplify right side
   71,837.56x = 4,548,975,388.42
5. Step 5: Solve for x
   x = 4,548,975,388.42/71,837.56
6. Step 6: Final answer
   x = 63,323.08