Finding the Fourth Proportional to 123,749.60, 185,697.30 and 81,751.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,749.60 : 185,697.30 = 81,751.10 : x
2. Step 2: Convert to fraction form
   123,749.60/185,697.30 = 81,751.10/x
3. Step 3: Cross multiply
   123,749.60x = 185,697.30 × 81,751.10
4. Step 4: Simplify right side
   123,749.60x = 15,180,958,542.03
5. Step 5: Solve for x
   x = 15,180,958,542.03/123,749.60
6. Step 6: Final answer
   x = 122,674.81