Finding the Fourth Proportional to 307,457, 424,290.67 and 173,321

Step by Step Solution

1. Step 1: Write the proportion equation
   307,457 : 424,290.67 = 173,321 : x
2. Step 2: Convert to fraction form
   307,457/424,290.67 = 173,321/x
3. Step 3: Cross multiply
   307,457x = 424,290.67 × 173,321
4. Step 4: Simplify right side
   307,457x = 73,538,483,215.07
5. Step 5: Solve for x
   x = 73,538,483,215.07/307,457
6. Step 6: Final answer
   x = 239,182.99