Finding the Fourth Proportional to 145,066.56, 217,661.76 and 81,934.08

Step by Step Solution

1. Step 1: Write the proportion equation
   145,066.56 : 217,661.76 = 81,934.08 : x
2. Step 2: Convert to fraction form
   145,066.56/217,661.76 = 81,934.08/x
3. Step 3: Cross multiply
   145,066.56x = 217,661.76 × 81,934.08
4. Step 4: Simplify right side
   145,066.56x = 17,833,916,056.78
5. Step 5: Solve for x
   x = 17,833,916,056.78/145,066.56
6. Step 6: Final answer
   x = 122,936.09