Finding the Fourth Proportional to 213,131.98, 294,121.56 and 117,638.02

Step by Step Solution

1. Step 1: Write the proportion equation
   213,131.98 : 294,121.56 = 117,638.02 : x
2. Step 2: Convert to fraction form
   213,131.98/294,121.56 = 117,638.02/x
3. Step 3: Cross multiply
   213,131.98x = 294,121.56 × 117,638.02
4. Step 4: Simplify right side
   213,131.98x = 34,599,877,957.71
5. Step 5: Solve for x
   x = 34,599,877,957.71/213,131.98
6. Step 6: Final answer
   x = 162,340.15