Finding the Fourth Proportional to 123,767, 185,620.72 and 57,143.12

Step by Step Solution

1. Step 1: Write the proportion equation
   123,767 : 185,620.72 = 57,143.12 : x
2. Step 2: Convert to fraction form
   123,767/185,620.72 = 57,143.12/x
3. Step 3: Cross multiply
   123,767x = 185,620.72 × 57,143.12
4. Step 4: Simplify right side
   123,767x = 10,606,947,077.45
5. Step 5: Solve for x
   x = 10,606,947,077.45/123,767
6. Step 6: Final answer
   x = 85,700.93