Finding the Fourth Proportional to 209,050.76, 288,491.56 and 113,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,050.76 : 288,491.56 = 113,557.50 : x
2. Step 2: Convert to fraction form
   209,050.76/288,491.56 = 113,557.50/x
3. Step 3: Cross multiply
   209,050.76x = 288,491.56 × 113,557.50
4. Step 4: Simplify right side
   209,050.76x = 32,760,380,040.81
5. Step 5: Solve for x
   x = 32,760,380,040.81/209,050.76
6. Step 6: Final answer
   x = 156,710.17