Finding the Fourth Proportional to 209,160.38, 288,643.16 and 113,667.10

Step by Step Solution

1. Step 1: Write the proportion equation
   209,160.38 : 288,643.16 = 113,667.10 : x
2. Step 2: Convert to fraction form
   209,160.38/288,643.16 = 113,667.10/x
3. Step 3: Cross multiply
   209,160.38x = 288,643.16 × 113,667.10
4. Step 4: Simplify right side
   209,160.38x = 32,809,230,932.04
5. Step 5: Solve for x
   x = 32,809,230,932.04/209,160.38
6. Step 6: Final answer
   x = 156,861.60