Finding the Fourth Proportional to 220,711, 304,560.12 and 123,892.69

Step by Step Solution

1. Step 1: Write the proportion equation
   220,711 : 304,560.12 = 123,892.69 : x
2. Step 2: Convert to fraction form
   220,711/304,560.12 = 123,892.69/x
3. Step 3: Cross multiply
   220,711x = 304,560.12 × 123,892.69
4. Step 4: Simplify right side
   220,711x = 37,732,772,533.52
5. Step 5: Solve for x
   x = 37,732,772,533.52/220,711
6. Step 6: Final answer
   x = 170,960.09