Finding the Fourth Proportional to 228,789, 315,728.82 and 139,365

Step by Step Solution

1. Step 1: Write the proportion equation
   228,789 : 315,728.82 = 139,365 : x
2. Step 2: Convert to fraction form
   228,789/315,728.82 = 139,365/x
3. Step 3: Cross multiply
   228,789x = 315,728.82 × 139,365
4. Step 4: Simplify right side
   228,789x = 44,001,546,999.30
5. Step 5: Solve for x
   x = 44,001,546,999.30/228,789
6. Step 6: Final answer
   x = 192,323.70