Finding the Third Proportional to 112,488.75 and 174,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,488.75 : 174,109.50 = 174,109.50 : x
2. Step 2: Convert to fraction form
   112,488.75/174,109.50 = 174,109.50/x
3. Step 3: Cross multiply
   112,488.75x = 174,109.50 × 174,109.50
4. Step 4: Simplify right side
   112,488.75x = 30,314,117,990.25
5. Step 5: Solve for x
   x = 30,314,117,990.25/112,488.75
6. Step 6: Final answer
   x = 269,485.78