Finding the Fourth Proportional to 209,002.89, 288,426.12 and 113,511.45

Step by Step Solution

1. Step 1: Write the proportion equation
   209,002.89 : 288,426.12 = 113,511.45 : x
2. Step 2: Convert to fraction form
   209,002.89/288,426.12 = 113,511.45/x
3. Step 3: Cross multiply
   209,002.89x = 288,426.12 × 113,511.45
4. Step 4: Simplify right side
   209,002.89x = 32,739,667,099.07
5. Step 5: Solve for x
   x = 32,739,667,099.07/209,002.89
6. Step 6: Final answer
   x = 156,646.96