Finding the Fourth Proportional to 208,113.55, 287,196.70 and 112,620.24

Step by Step Solution

1. Step 1: Write the proportion equation
   208,113.55 : 287,196.70 = 112,620.24 : x
2. Step 2: Convert to fraction form
   208,113.55/287,196.70 = 112,620.24/x
3. Step 3: Cross multiply
   208,113.55x = 287,196.70 × 112,620.24
4. Step 4: Simplify right side
   208,113.55x = 32,344,162,105.69
5. Step 5: Solve for x
   x = 32,344,162,105.69/208,113.55
6. Step 6: Final answer
   x = 155,415.94