Finding the Fourth Proportional to 213,139.42, 294,111.42 and 117,639.92

Step by Step Solution

1. Step 1: Write the proportion equation
   213,139.42 : 294,111.42 = 117,639.92 : x
2. Step 2: Convert to fraction form
   213,139.42/294,111.42 = 117,639.92/x
3. Step 3: Cross multiply
   213,139.42x = 294,111.42 × 117,639.92
4. Step 4: Simplify right side
   213,139.42x = 34,599,243,919.89
5. Step 5: Solve for x
   x = 34,599,243,919.89/213,139.42
6. Step 6: Final answer
   x = 162,331.51