Finding the Fourth Proportional to 123,069.59, 184,989.73 and 81,218.61

Step by Step Solution

1. Step 1: Write the proportion equation
   123,069.59 : 184,989.73 = 81,218.61 : x
2. Step 2: Convert to fraction form
   123,069.59/184,989.73 = 81,218.61/x
3. Step 3: Cross multiply
   123,069.59x = 184,989.73 × 81,218.61
4. Step 4: Simplify right side
   123,069.59x = 15,024,609,509.96
5. Step 5: Solve for x
   x = 15,024,609,509.96/123,069.59
6. Step 6: Final answer
   x = 122,082.22