Finding the Fourth Proportional to 209,364.48, 288,914.72 and 113,871.04

Step by Step Solution

1. Step 1: Write the proportion equation
   209,364.48 : 288,914.72 = 113,871.04 : x
2. Step 2: Convert to fraction form
   209,364.48/288,914.72 = 113,871.04/x
3. Step 3: Cross multiply
   209,364.48x = 288,914.72 × 113,871.04
4. Step 4: Simplify right side
   209,364.48x = 32,899,019,637.71
5. Step 5: Solve for x
   x = 32,899,019,637.71/209,364.48
6. Step 6: Final answer
   x = 157,137.54