Finding the Fourth Proportional to 139,613.26, 209,417.20 and 39,774.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,613.26 : 209,417.20 = 39,774.10 : x
2. Step 2: Convert to fraction form
   139,613.26/209,417.20 = 39,774.10/x
3. Step 3: Cross multiply
   139,613.26x = 209,417.20 × 39,774.10
4. Step 4: Simplify right side
   139,613.26x = 8,329,380,654.52
5. Step 5: Solve for x
   x = 8,329,380,654.52/139,613.26
6. Step 6: Final answer
   x = 59,660.38