Finding the Fourth Proportional to 123,172.22, 169,977.76 and 72,174.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,172.22 : 169,977.76 = 72,174.78 : x
2. Step 2: Convert to fraction form
   123,172.22/169,977.76 = 72,174.78/x
3. Step 3: Cross multiply
   123,172.22x = 169,977.76 × 72,174.78
4. Step 4: Simplify right side
   123,172.22x = 12,268,107,432.89
5. Step 5: Solve for x
   x = 12,268,107,432.89/123,172.22
6. Step 6: Final answer
   x = 99,601.25