Finding the Third Proportional to 43,090 and 89,870

Step by Step Solution

1. Step 1: Write the proportion equation
   43,090 : 89,870 = 89,870 : x
2. Step 2: Convert to fraction form
   43,090/89,870 = 89,870/x
3. Step 3: Cross multiply
   43,090x = 89,870 × 89,870
4. Step 4: Simplify right side
   43,090x = 8,076,616,900
5. Step 5: Solve for x
   x = 8,076,616,900/43,090
6. Step 6: Final answer
   x = 187,435.99