Finding the Third Proportional to 56,389.50 and 133,589.25

Step by Step Solution

1. Step 1: Write the proportion equation
   56,389.50 : 133,589.25 = 133,589.25 : x
2. Step 2: Convert to fraction form
   56,389.50/133,589.25 = 133,589.25/x
3. Step 3: Cross multiply
   56,389.50x = 133,589.25 × 133,589.25
4. Step 4: Simplify right side
   56,389.50x = 17,846,087,715.56
5. Step 5: Solve for x
   x = 17,846,087,715.56/56,389.50
6. Step 6: Final answer
   x = 316,478.91