Finding the Third Proportional to 90,152.16 and 139,585.78

Step by Step Solution

1. Step 1: Write the proportion equation
   90,152.16 : 139,585.78 = 139,585.78 : x
2. Step 2: Convert to fraction form
   90,152.16/139,585.78 = 139,585.78/x
3. Step 3: Cross multiply
   90,152.16x = 139,585.78 × 139,585.78
4. Step 4: Simplify right side
   90,152.16x = 19,484,190,327.17
5. Step 5: Solve for x
   x = 19,484,190,327.17/90,152.16
6. Step 6: Final answer
   x = 216,125.62