Finding the Third Proportional to 99,360 and 147,690

Step by Step Solution

1. Step 1: Write the proportion equation
   99,360 : 147,690 = 147,690 : x
2. Step 2: Convert to fraction form
   99,360/147,690 = 147,690/x
3. Step 3: Cross multiply
   99,360x = 147,690 × 147,690
4. Step 4: Simplify right side
   99,360x = 21,812,336,100
5. Step 5: Solve for x
   x = 21,812,336,100/99,360
6. Step 6: Final answer
   x = 219,528.34