Finding the Fourth Proportional to 208,300.47, 287,454.21 and 112,806.87

Step by Step Solution

1. Step 1: Write the proportion equation
   208,300.47 : 287,454.21 = 112,806.87 : x
2. Step 2: Convert to fraction form
   208,300.47/287,454.21 = 112,806.87/x
3. Step 3: Cross multiply
   208,300.47x = 287,454.21 × 112,806.87
4. Step 4: Simplify right side
   208,300.47x = 32,426,809,698.42
5. Step 5: Solve for x
   x = 32,426,809,698.42/208,300.47
6. Step 6: Final answer
   x = 155,673.24