Finding the Fourth Proportional to 140,538.61, 193,888.78 and 89,542.23

Step by Step Solution

1. Step 1: Write the proportion equation
   140,538.61 : 193,888.78 = 89,542.23 : x
2. Step 2: Convert to fraction form
   140,538.61/193,888.78 = 89,542.23/x
3. Step 3: Cross multiply
   140,538.61x = 193,888.78 × 89,542.23
4. Step 4: Simplify right side
   140,538.61x = 17,361,233,733.18
5. Step 5: Solve for x
   x = 17,361,233,733.18/140,538.61
6. Step 6: Final answer
   x = 123,533.55