Finding the Fourth Proportional to 139,587.05, 209,381.72 and 39,747.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,587.05 : 209,381.72 = 39,747.12 : x
2. Step 2: Convert to fraction form
   139,587.05/209,381.72 = 39,747.12/x
3. Step 3: Cross multiply
   139,587.05x = 209,381.72 × 39,747.12
4. Step 4: Simplify right side
   139,587.05x = 8,322,320,151.91
5. Step 5: Solve for x
   x = 8,322,320,151.91/139,587.05
6. Step 6: Final answer
   x = 59,621.01