Finding the Fourth Proportional to 129,667.23, 178,941.56 and 81,942.03

Step by Step Solution

1. Step 1: Write the proportion equation
   129,667.23 : 178,941.56 = 81,942.03 : x
2. Step 2: Convert to fraction form
   129,667.23/178,941.56 = 81,942.03/x
3. Step 3: Cross multiply
   129,667.23x = 178,941.56 × 81,942.03
4. Step 4: Simplify right side
   129,667.23x = 14,662,834,268.06
5. Step 5: Solve for x
   x = 14,662,834,268.06/129,667.23
6. Step 6: Final answer
   x = 113,080.49