Finding the Fourth Proportional to 217,111.30, 325,724.55 and 76,855.30

Step by Step Solution

1. Step 1: Write the proportion equation
   217,111.30 : 325,724.55 = 76,855.30 : x
2. Step 2: Convert to fraction form
   217,111.30/325,724.55 = 76,855.30/x
3. Step 3: Cross multiply
   217,111.30x = 325,724.55 × 76,855.30
4. Step 4: Simplify right side
   217,111.30x = 25,033,658,007.62
5. Step 5: Solve for x
   x = 25,033,658,007.62/217,111.30
6. Step 6: Final answer
   x = 115,303.34