Finding the Third Proportional to 99,688 and 142,188

Step by Step Solution

1. Step 1: Write the proportion equation
   99,688 : 142,188 = 142,188 : x
2. Step 2: Convert to fraction form
   99,688/142,188 = 142,188/x
3. Step 3: Cross multiply
   99,688x = 142,188 × 142,188
4. Step 4: Simplify right side
   99,688x = 20,217,427,344
5. Step 5: Solve for x
   x = 20,217,427,344/99,688
6. Step 6: Final answer
   x = 202,807.03