Finding the Fourth Proportional to 139,385.30, 209,085.89 and 39,537.68

Step by Step Solution

1. Step 1: Write the proportion equation
   139,385.30 : 209,085.89 = 39,537.68 : x
2. Step 2: Convert to fraction form
   139,385.30/209,085.89 = 39,537.68/x
3. Step 3: Cross multiply
   139,385.30x = 209,085.89 × 39,537.68
4. Step 4: Simplify right side
   139,385.30x = 8,266,769,768.22
5. Step 5: Solve for x
   x = 8,266,769,768.22/139,385.30
6. Step 6: Final answer
   x = 59,308.77