Finding the Third Proportional to 90,301.50 and 139,748.63

Step by Step Solution

1. Step 1: Write the proportion equation
   90,301.50 : 139,748.63 = 139,748.63 : x
2. Step 2: Convert to fraction form
   90,301.50/139,748.63 = 139,748.63/x
3. Step 3: Cross multiply
   90,301.50x = 139,748.63 × 139,748.63
4. Step 4: Simplify right side
   90,301.50x = 19,529,678,189.39
5. Step 5: Solve for x
   x = 19,529,678,189.39/90,301.50
6. Step 6: Final answer
   x = 216,271.91