Finding the Fourth Proportional to 220,644, 304,488.72 and 120,042.72

Step by Step Solution

1. Step 1: Write the proportion equation
   220,644 : 304,488.72 = 120,042.72 : x
2. Step 2: Convert to fraction form
   220,644/304,488.72 = 120,042.72/x
3. Step 3: Cross multiply
   220,644x = 304,488.72 × 120,042.72
4. Step 4: Simplify right side
   220,644x = 36,551,654,158.12
5. Step 5: Solve for x
   x = 36,551,654,158.12/220,644
6. Step 6: Final answer
   x = 165,658.95