Finding the Third Proportional to 70,400 and 105,240

Step by Step Solution

1. Step 1: Write the proportion equation
   70,400 : 105,240 = 105,240 : x
2. Step 2: Convert to fraction form
   70,400/105,240 = 105,240/x
3. Step 3: Cross multiply
   70,400x = 105,240 × 105,240
4. Step 4: Simplify right side
   70,400x = 11,075,457,600
5. Step 5: Solve for x
   x = 11,075,457,600/70,400
6. Step 6: Final answer
   x = 157,321.84