Finding the Fourth Proportional to 139,364.72, 209,047.01 and 39,525.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,364.72 : 209,047.01 = 39,525.78 : x
2. Step 2: Convert to fraction form
   139,364.72/209,047.01 = 39,525.78/x
3. Step 3: Cross multiply
   139,364.72x = 209,047.01 × 39,525.78
4. Step 4: Simplify right side
   139,364.72x = 8,262,745,929.29
5. Step 5: Solve for x
   x = 8,262,745,929.29/139,364.72
6. Step 6: Final answer
   x = 59,288.65