Finding the Fourth Proportional to 123,786, 185,649.12 and 57,162.08

Step by Step Solution

1. Step 1: Write the proportion equation
   123,786 : 185,649.12 = 57,162.08 : x
2. Step 2: Convert to fraction form
   123,786/185,649.12 = 57,162.08/x
3. Step 3: Cross multiply
   123,786x = 185,649.12 × 57,162.08
4. Step 4: Simplify right side
   123,786x = 10,612,089,849.37
5. Step 5: Solve for x
   x = 10,612,089,849.37/123,786
6. Step 6: Final answer
   x = 85,729.32