Finding the Fourth Proportional to 249,112.86, 343,671 and 173,705.10

Step by Step Solution

1. Step 1: Write the proportion equation
   249,112.86 : 343,671 = 173,705.10 : x
2. Step 2: Convert to fraction form
   249,112.86/343,671 = 173,705.10/x
3. Step 3: Cross multiply
   249,112.86x = 343,671 × 173,705.10
4. Step 4: Simplify right side
   249,112.86x = 59,697,405,422.10
5. Step 5: Solve for x
   x = 59,697,405,422.10/249,112.86
6. Step 6: Final answer
   x = 239,640.00