Finding the Fourth Proportional to 57,421.42, 85,802.71 and 43,837.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,421.42 : 85,802.71 = 43,837.42 : x
2. Step 2: Convert to fraction form
   57,421.42/85,802.71 = 43,837.42/x
3. Step 3: Cross multiply
   57,421.42x = 85,802.71 × 43,837.42
4. Step 4: Simplify right side
   57,421.42x = 3,761,369,435.41
5. Step 5: Solve for x
   x = 3,761,369,435.41/57,421.42
6. Step 6: Final answer
   x = 65,504.64