Finding the Fourth Proportional to 148,595.86, 221,723.54 and 139,555.36

Step by Step Solution

1. Step 1: Write the proportion equation
   148,595.86 : 221,723.54 = 139,555.36 : x
2. Step 2: Convert to fraction form
   148,595.86/221,723.54 = 139,555.36/x
3. Step 3: Cross multiply
   148,595.86x = 221,723.54 × 139,555.36
4. Step 4: Simplify right side
   148,595.86x = 30,942,708,445.17
5. Step 5: Solve for x
   x = 30,942,708,445.17/148,595.86
6. Step 6: Final answer
   x = 208,233.99