Finding the Fourth Proportional to 57,419.42, 85,799.72 and 43,835.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,419.42 : 85,799.72 = 43,835.42 : x
2. Step 2: Convert to fraction form
   57,419.42/85,799.72 = 43,835.42/x
3. Step 3: Cross multiply
   57,419.42x = 85,799.72 × 43,835.42
4. Step 4: Simplify right side
   57,419.42x = 3,761,067,086.17
5. Step 5: Solve for x
   x = 3,761,067,086.17/57,419.42
6. Step 6: Final answer
   x = 65,501.66