Finding the Fourth Proportional to 160,557.59, 221,359.42 and 138,137.42

Step by Step Solution

1. Step 1: Write the proportion equation
   160,557.59 : 221,359.42 = 138,137.42 : x
2. Step 2: Convert to fraction form
   160,557.59/221,359.42 = 138,137.42/x
3. Step 3: Cross multiply
   160,557.59x = 221,359.42 × 138,137.42
4. Step 4: Simplify right side
   160,557.59x = 30,578,018,410.04
5. Step 5: Solve for x
   x = 30,578,018,410.04/160,557.59
6. Step 6: Final answer
   x = 190,448.91