Finding the Third Proportional to 90,430.50 and 189,123

Step by Step Solution

1. Step 1: Write the proportion equation
   90,430.50 : 189,123 = 189,123 : x
2. Step 2: Convert to fraction form
   90,430.50/189,123 = 189,123/x
3. Step 3: Cross multiply
   90,430.50x = 189,123 × 189,123
4. Step 4: Simplify right side
   90,430.50x = 35,767,509,129
5. Step 5: Solve for x
   x = 35,767,509,129/90,430.50
6. Step 6: Final answer
   x = 395,524.84