Finding the Fourth Proportional to 208,109.89, 287,193.69 and 112,618.63

Step by Step Solution

1. Step 1: Write the proportion equation
   208,109.89 : 287,193.69 = 112,618.63 : x
2. Step 2: Convert to fraction form
   208,109.89/287,193.69 = 112,618.63/x
3. Step 3: Cross multiply
   208,109.89x = 287,193.69 × 112,618.63
4. Step 4: Simplify right side
   208,109.89x = 32,343,359,912.44
5. Step 5: Solve for x
   x = 32,343,359,912.44/208,109.89
6. Step 6: Final answer
   x = 155,414.81