Finding the Fourth Proportional to 133,091.10, 183,667.50 and 72,661.05

Step by Step Solution

1. Step 1: Write the proportion equation
   133,091.10 : 183,667.50 = 72,661.05 : x
2. Step 2: Convert to fraction form
   133,091.10/183,667.50 = 72,661.05/x
3. Step 3: Cross multiply
   133,091.10x = 183,667.50 × 72,661.05
4. Step 4: Simplify right side
   133,091.10x = 13,345,473,400.88
5. Step 5: Solve for x
   x = 13,345,473,400.88/133,091.10
6. Step 6: Final answer
   x = 100,273.22