Finding the Fourth Proportional to 123,502.50, 170,554.56 and 105,492.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,502.50 : 170,554.56 = 105,492.56 : x
2. Step 2: Convert to fraction form
   123,502.50/170,554.56 = 105,492.56/x
3. Step 3: Cross multiply
   123,502.50x = 170,554.56 × 105,492.56
4. Step 4: Simplify right side
   123,502.50x = 17,992,236,301.30
5. Step 5: Solve for x
   x = 17,992,236,301.30/123,502.50
6. Step 6: Final answer
   x = 145,683.17