Finding the Fourth Proportional to 133,061.72, 183,617.32 and 72,620.20

Step by Step Solution

1. Step 1: Write the proportion equation
   133,061.72 : 183,617.32 = 72,620.20 : x
2. Step 2: Convert to fraction form
   133,061.72/183,617.32 = 72,620.20/x
3. Step 3: Cross multiply
   133,061.72x = 183,617.32 × 72,620.20
4. Step 4: Simplify right side
   133,061.72x = 13,334,326,501.86
5. Step 5: Solve for x
   x = 13,334,326,501.86/133,061.72
6. Step 6: Final answer
   x = 100,211.59