Finding the Fourth Proportional to 133,111.75, 183,697.98 and 72,686.20

Step by Step Solution

1. Step 1: Write the proportion equation
   133,111.75 : 183,697.98 = 72,686.20 : x
2. Step 2: Convert to fraction form
   133,111.75/183,697.98 = 72,686.20/x
3. Step 3: Cross multiply
   133,111.75x = 183,697.98 × 72,686.20
4. Step 4: Simplify right side
   133,111.75x = 13,352,308,113.88
5. Step 5: Solve for x
   x = 13,352,308,113.88/133,111.75
6. Step 6: Final answer
   x = 100,309.01