Finding the Fourth Proportional to 218,116.96, 326,942.16 and 99,610.72

Step by Step Solution

1. Step 1: Write the proportion equation
   218,116.96 : 326,942.16 = 99,610.72 : x
2. Step 2: Convert to fraction form
   218,116.96/326,942.16 = 99,610.72/x
3. Step 3: Cross multiply
   218,116.96x = 326,942.16 × 99,610.72
4. Step 4: Simplify right side
   218,116.96x = 32,566,943,955.96
5. Step 5: Solve for x
   x = 32,566,943,955.96/218,116.96
6. Step 6: Final answer
   x = 149,309.54