Finding the Fourth Proportional to 139,713.93, 209,572.83 and 39,874.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,713.93 : 209,572.83 = 39,874.10 : x
2. Step 2: Convert to fraction form
   139,713.93/209,572.83 = 39,874.10/x
3. Step 3: Cross multiply
   139,713.93x = 209,572.83 × 39,874.10
4. Step 4: Simplify right side
   139,713.93x = 8,356,526,932.84
5. Step 5: Solve for x
   x = 8,356,526,932.84/139,713.93
6. Step 6: Final answer
   x = 59,811.69