Finding the Fourth Proportional to 139,967.10, 209,949.69 and 34,785.90

Step by Step Solution

1. Step 1: Write the proportion equation
   139,967.10 : 209,949.69 = 34,785.90 : x
2. Step 2: Convert to fraction form
   139,967.10/209,949.69 = 34,785.90/x
3. Step 3: Cross multiply
   139,967.10x = 209,949.69 × 34,785.90
4. Step 4: Simplify right side
   139,967.10x = 7,303,288,921.37
5. Step 5: Solve for x
   x = 7,303,288,921.37/139,967.10
6. Step 6: Final answer
   x = 52,178.61