Finding the Fourth Proportional to 123,443.80, 184,697.70 and 81,971.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,443.80 : 184,697.70 = 81,971.80 : x
2. Step 2: Convert to fraction form
   123,443.80/184,697.70 = 81,971.80/x
3. Step 3: Cross multiply
   123,443.80x = 184,697.70 × 81,971.80
4. Step 4: Simplify right side
   123,443.80x = 15,140,002,924.86
5. Step 5: Solve for x
   x = 15,140,002,924.86/123,443.80
6. Step 6: Final answer
   x = 122,646.93