Finding the Fourth Proportional to 231,499.15, 348,983.85 and 216,067.99

Step by Step Solution

1. Step 1: Write the proportion equation
   231,499.15 : 348,983.85 = 216,067.99 : x
2. Step 2: Convert to fraction form
   231,499.15/348,983.85 = 216,067.99/x
3. Step 3: Cross multiply
   231,499.15x = 348,983.85 × 216,067.99
4. Step 4: Simplify right side
   231,499.15x = 75,404,238,679.67
5. Step 5: Solve for x
   x = 75,404,238,679.67/231,499.15
6. Step 6: Final answer
   x = 325,721.45