Finding the Third Proportional to 90,099 and 129,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,099 : 129,784.50 = 129,784.50 : x
2. Step 2: Convert to fraction form
   90,099/129,784.50 = 129,784.50/x
3. Step 3: Cross multiply
   90,099x = 129,784.50 × 129,784.50
4. Step 4: Simplify right side
   90,099x = 16,844,016,440.25
5. Step 5: Solve for x
   x = 16,844,016,440.25/90,099
6. Step 6: Final answer
   x = 186,950.09