Finding the Third Proportional to 42,129 and 89,453.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,129 : 89,453.25 = 89,453.25 : x
2. Step 2: Convert to fraction form
   42,129/89,453.25 = 89,453.25/x
3. Step 3: Cross multiply
   42,129x = 89,453.25 × 89,453.25
4. Step 4: Simplify right side
   42,129x = 8,001,883,935.56
5. Step 5: Solve for x
   x = 8,001,883,935.56/42,129
6. Step 6: Final answer
   x = 189,937.67