Finding the Fourth Proportional to 613,196.68, 919,799.12 and 213,835.92

Step by Step Solution

1. Step 1: Write the proportion equation
   613,196.68 : 919,799.12 = 213,835.92 : x
2. Step 2: Convert to fraction form
   613,196.68/919,799.12 = 213,835.92/x
3. Step 3: Cross multiply
   613,196.68x = 919,799.12 × 213,835.92
4. Step 4: Simplify right side
   613,196.68x = 196,686,091,040.39
5. Step 5: Solve for x
   x = 196,686,091,040.39/613,196.68
6. Step 6: Final answer
   x = 320,755.31