Finding the Fourth Proportional to 139,875.10, 209,649.93 and 79,945.54

Step by Step Solution

1. Step 1: Write the proportion equation
   139,875.10 : 209,649.93 = 79,945.54 : x
2. Step 2: Convert to fraction form
   139,875.10/209,649.93 = 79,945.54/x
3. Step 3: Cross multiply
   139,875.10x = 209,649.93 × 79,945.54
4. Step 4: Simplify right side
   139,875.10x = 16,760,576,864.81
5. Step 5: Solve for x
   x = 16,760,576,864.81/139,875.10
6. Step 6: Final answer
   x = 119,825.31