Finding the Third Proportional to 12,456 and 27,090

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456 : 27,090 = 27,090 : x
2. Step 2: Convert to fraction form
   12,456/27,090 = 27,090/x
3. Step 3: Cross multiply
   12,456x = 27,090 × 27,090
4. Step 4: Simplify right side
   12,456x = 733,868,100
5. Step 5: Solve for x
   x = 733,868,100/12,456
6. Step 6: Final answer
   x = 58,916.84