Finding the Fourth Proportional to 148,594.36, 221,721.31 and 139,553.86

Step by Step Solution

1. Step 1: Write the proportion equation
   148,594.36 : 221,721.31 = 139,553.86 : x
2. Step 2: Convert to fraction form
   148,594.36/221,721.31 = 139,553.86/x
3. Step 3: Cross multiply
   148,594.36x = 221,721.31 × 139,553.86
4. Step 4: Simplify right side
   148,594.36x = 30,942,064,654.76
5. Step 5: Solve for x
   x = 30,942,064,654.76/148,594.36
6. Step 6: Final answer
   x = 208,231.76