Finding the Fourth Proportional to 711,991.56, 1,068,162.34 and 213,355.56

Step by Step Solution

1. Step 1: Write the proportion equation
   711,991.56 : 1,068,162.34 = 213,355.56 : x
2. Step 2: Convert to fraction form
   711,991.56/1,068,162.34 = 213,355.56/x
3. Step 3: Cross multiply
   711,991.56x = 1,068,162.34 × 213,355.56
4. Step 4: Simplify right side
   711,991.56x = 227,898,374,221.61
5. Step 5: Solve for x
   x = 227,898,374,221.61/711,991.56
6. Step 6: Final answer
   x = 320,085.78