Finding the Fourth Proportional to 213,111.15, 294,091.51 and 117,615.80

Step by Step Solution

1. Step 1: Write the proportion equation
   213,111.15 : 294,091.51 = 117,615.80 : x
2. Step 2: Convert to fraction form
   213,111.15/294,091.51 = 117,615.80/x
3. Step 3: Cross multiply
   213,111.15x = 294,091.51 × 117,615.80
4. Step 4: Simplify right side
   213,111.15x = 34,589,807,229.31
5. Step 5: Solve for x
   x = 34,589,807,229.31/213,111.15
6. Step 6: Final answer
   x = 162,308.76