Finding the Fourth Proportional to 307,738, 424,679.72 and 166,426

Step by Step Solution

1. Step 1: Write the proportion equation
   307,738 : 424,679.72 = 166,426 : x
2. Step 2: Convert to fraction form
   307,738/424,679.72 = 166,426/x
3. Step 3: Cross multiply
   307,738x = 424,679.72 × 166,426
4. Step 4: Simplify right side
   307,738x = 70,677,747,080.72
5. Step 5: Solve for x
   x = 70,677,747,080.72/307,738
6. Step 6: Final answer
   x = 229,668.57