Finding the Fourth Proportional to 208,141.49, 287,234.75 and 112,648.25

Step by Step Solution

1. Step 1: Write the proportion equation
   208,141.49 : 287,234.75 = 112,648.25 : x
2. Step 2: Convert to fraction form
   208,141.49/287,234.75 = 112,648.25/x
3. Step 3: Cross multiply
   208,141.49x = 287,234.75 × 112,648.25
4. Step 4: Simplify right side
   208,141.49x = 32,356,489,927.27
5. Step 5: Solve for x
   x = 32,356,489,927.27/208,141.49
6. Step 6: Final answer
   x = 155,454.31