Finding the Fourth Proportional to 340,173.56, 510,426.32 and 213,873.18

Step by Step Solution

1. Step 1: Write the proportion equation
   340,173.56 : 510,426.32 = 213,873.18 : x
2. Step 2: Convert to fraction form
   340,173.56/510,426.32 = 213,873.18/x
3. Step 3: Cross multiply
   340,173.56x = 510,426.32 × 213,873.18
4. Step 4: Simplify right side
   340,173.56x = 109,166,499,144.73
5. Step 5: Solve for x
   x = 109,166,499,144.73/340,173.56
6. Step 6: Final answer
   x = 320,914.13