Finding the Fourth Proportional to 85,242.72, 117,641.36 and 49,432.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85,242.72 : 117,641.36 = 49,432.42 : x
2. Step 2: Convert to fraction form
   85,242.72/117,641.36 = 49,432.42/x
3. Step 3: Cross multiply
   85,242.72x = 117,641.36 × 49,432.42
4. Step 4: Simplify right side
   85,242.72x = 5,815,296,946.37
5. Step 5: Solve for x
   x = 5,815,296,946.37/85,242.72
6. Step 6: Final answer
   x = 68,220.45