Finding the Fourth Proportional to 208,422, 287,622.55 and 112,928.69

Step by Step Solution

1. Step 1: Write the proportion equation
   208,422 : 287,622.55 = 112,928.69 : x
2. Step 2: Convert to fraction form
   208,422/287,622.55 = 112,928.69/x
3. Step 3: Cross multiply
   208,422x = 287,622.55 × 112,928.69
4. Step 4: Simplify right side
   208,422x = 32,480,838,222.69
5. Step 5: Solve for x
   x = 32,480,838,222.69/208,422
6. Step 6: Final answer
   x = 155,841.70