Finding the Fourth Proportional to 212,800.98, 293,667.35 and 117,311.10

Step by Step Solution

1. Step 1: Write the proportion equation
   212,800.98 : 293,667.35 = 117,311.10 : x
2. Step 2: Convert to fraction form
   212,800.98/293,667.35 = 117,311.10/x
3. Step 3: Cross multiply
   212,800.98x = 293,667.35 × 117,311.10
4. Step 4: Simplify right side
   212,800.98x = 34,450,439,862.59
5. Step 5: Solve for x
   x = 34,450,439,862.59/212,800.98
6. Step 6: Final answer
   x = 161,890.42