Finding the Fourth Proportional to 340,050.72, 510,003.18 and 140,319.30

Step by Step Solution

1. Step 1: Write the proportion equation
   340,050.72 : 510,003.18 = 140,319.30 : x
2. Step 2: Convert to fraction form
   340,050.72/510,003.18 = 140,319.30/x
3. Step 3: Cross multiply
   340,050.72x = 510,003.18 × 140,319.30
4. Step 4: Simplify right side
   340,050.72x = 71,563,289,215.37
5. Step 5: Solve for x
   x = 71,563,289,215.37/340,050.72
6. Step 6: Final answer
   x = 210,448.87