Finding the Fourth Proportional to 123,492.72, 170,420.78 and 66,904.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,492.72 : 170,420.78 = 66,904.10 : x
2. Step 2: Convert to fraction form
   123,492.72/170,420.78 = 66,904.10/x
3. Step 3: Cross multiply
   123,492.72x = 170,420.78 × 66,904.10
4. Step 4: Simplify right side
   123,492.72x = 11,401,848,485.10
5. Step 5: Solve for x
   x = 11,401,848,485.10/123,492.72
6. Step 6: Final answer
   x = 92,328.10