Finding the Fourth Proportional to 129,667.27, 178,943.99 and 72,306.03

Step by Step Solution

1. Step 1: Write the proportion equation
   129,667.27 : 178,943.99 = 72,306.03 : x
2. Step 2: Convert to fraction form
   129,667.27/178,943.99 = 72,306.03/x
3. Step 3: Cross multiply
   129,667.27x = 178,943.99 × 72,306.03
4. Step 4: Simplify right side
   129,667.27x = 12,938,729,051.17
5. Step 5: Solve for x
   x = 12,938,729,051.17/129,667.27
6. Step 6: Final answer
   x = 99,784.08