Finding the Third Proportional to 39,142 and 56,090

Step by Step Solution

1. Step 1: Write the proportion equation
   39,142 : 56,090 = 56,090 : x
2. Step 2: Convert to fraction form
   39,142/56,090 = 56,090/x
3. Step 3: Cross multiply
   39,142x = 56,090 × 56,090
4. Step 4: Simplify right side
   39,142x = 3,146,088,100
5. Step 5: Solve for x
   x = 3,146,088,100/39,142
6. Step 6: Final answer
   x = 80,376.27