Finding the Fourth Proportional to 309,488.45, 427,084.23 and 173,530.17

Step by Step Solution

1. Step 1: Write the proportion equation
   309,488.45 : 427,084.23 = 173,530.17 : x
2. Step 2: Convert to fraction form
   309,488.45/427,084.23 = 173,530.17/x
3. Step 3: Cross multiply
   309,488.45x = 427,084.23 × 173,530.17
4. Step 4: Simplify right side
   309,488.45x = 74,111,999,036.22
5. Step 5: Solve for x
   x = 74,111,999,036.22/309,488.45
6. Step 6: Final answer
   x = 239,466.12