Finding the Fourth Proportional to 139,503.20, 209,255.41 and 34,321.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,503.20 : 209,255.41 = 34,321.87 : x
2. Step 2: Convert to fraction form
   139,503.20/209,255.41 = 34,321.87/x
3. Step 3: Cross multiply
   139,503.20x = 209,255.41 × 34,321.87
4. Step 4: Simplify right side
   139,503.20x = 7,182,035,932.54
5. Step 5: Solve for x
   x = 7,182,035,932.54/139,503.20
6. Step 6: Final answer
   x = 51,482.95