Finding the Third Proportional to 99,740 and 145,752.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,740 : 145,752.50 = 145,752.50 : x
2. Step 2: Convert to fraction form
   99,740/145,752.50 = 145,752.50/x
3. Step 3: Cross multiply
   99,740x = 145,752.50 × 145,752.50
4. Step 4: Simplify right side
   99,740x = 21,243,791,256.25
5. Step 5: Solve for x
   x = 21,243,791,256.25/99,740
6. Step 6: Final answer
   x = 212,991.69