Finding the Fourth Proportional to 139,898.88, 193,026.24 and 89,665.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,898.88 : 193,026.24 = 89,665.92 : x
2. Step 2: Convert to fraction form
   139,898.88/193,026.24 = 89,665.92/x
3. Step 3: Cross multiply
   139,898.88x = 193,026.24 × 89,665.92
4. Step 4: Simplify right side
   139,898.88x = 17,307,875,393.74
5. Step 5: Solve for x
   x = 17,307,875,393.74/139,898.88
6. Step 6: Final answer
   x = 123,717.04