Finding the Fourth Proportional to 219,454.40, 302,865.72 and 123,978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   219,454.40 : 302,865.72 = 123,978.62 : x
2. Step 2: Convert to fraction form
   219,454.40/302,865.72 = 123,978.62/x
3. Step 3: Cross multiply
   219,454.40x = 302,865.72 × 123,978.62
4. Step 4: Simplify right side
   219,454.40x = 37,548,874,010.91
5. Step 5: Solve for x
   x = 37,548,874,010.91/219,454.40
6. Step 6: Final answer
   x = 171,101.03