Finding the Fourth Proportional to 139,660.59, 209,491.32 and 34,479.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,660.59 : 209,491.32 = 34,479.57 : x
2. Step 2: Convert to fraction form
   139,660.59/209,491.32 = 34,479.57/x
3. Step 3: Cross multiply
   139,660.59x = 209,491.32 × 34,479.57
4. Step 4: Simplify right side
   139,660.59x = 7,223,170,632.33
5. Step 5: Solve for x
   x = 7,223,170,632.33/139,660.59
6. Step 6: Final answer
   x = 51,719.46