Finding the Fourth Proportional to 220,089.72, 303,909.90 and 139,659.96

Step by Step Solution

1. Step 1: Write the proportion equation
   220,089.72 : 303,909.90 = 139,659.96 : x
2. Step 2: Convert to fraction form
   220,089.72/303,909.90 = 139,659.96/x
3. Step 3: Cross multiply
   220,089.72x = 303,909.90 × 139,659.96
4. Step 4: Simplify right side
   220,089.72x = 42,444,044,477.60
5. Step 5: Solve for x
   x = 42,444,044,477.60/220,089.72
6. Step 6: Final answer
   x = 192,848.83