Finding the Fourth Proportional to 199,111.32, 298,681.56 and 79,215.12

Step by Step Solution

1. Step 1: Write the proportion equation
   199,111.32 : 298,681.56 = 79,215.12 : x
2. Step 2: Convert to fraction form
   199,111.32/298,681.56 = 79,215.12/x
3. Step 3: Cross multiply
   199,111.32x = 298,681.56 × 79,215.12
4. Step 4: Simplify right side
   199,111.32x = 23,660,095,617.19
5. Step 5: Solve for x
   x = 23,660,095,617.19/199,111.32
6. Step 6: Final answer
   x = 118,828.48