Finding the Third Proportional to 51,392 and 77,090

Step by Step Solution

1. Step 1: Write the proportion equation
   51,392 : 77,090 = 77,090 : x
2. Step 2: Convert to fraction form
   51,392/77,090 = 77,090/x
3. Step 3: Cross multiply
   51,392x = 77,090 × 77,090
4. Step 4: Simplify right side
   51,392x = 5,942,868,100
5. Step 5: Solve for x
   x = 5,942,868,100/51,392
6. Step 6: Final answer
   x = 115,638.00