Finding the Fourth Proportional to 139,500.86, 209,219.76 and 39,658.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,500.86 : 209,219.76 = 39,658.84 : x
2. Step 2: Convert to fraction form
   139,500.86/209,219.76 = 39,658.84/x
3. Step 3: Cross multiply
   139,500.86x = 209,219.76 × 39,658.84
4. Step 4: Simplify right side
   139,500.86x = 8,297,412,463.63
5. Step 5: Solve for x
   x = 8,297,412,463.63/139,500.86
6. Step 6: Final answer
   x = 59,479.29