Finding the Fourth Proportional to 55,609.18, 76,775.52 and 42,838.31

Step by Step Solution

1. Step 1: Write the proportion equation
   55,609.18 : 76,775.52 = 42,838.31 : x
2. Step 2: Convert to fraction form
   55,609.18/76,775.52 = 42,838.31/x
3. Step 3: Cross multiply
   55,609.18x = 76,775.52 × 42,838.31
4. Step 4: Simplify right side
   55,609.18x = 3,288,933,718.11
5. Step 5: Solve for x
   x = 3,288,933,718.11/55,609.18
6. Step 6: Final answer
   x = 59,143.72