Finding the Third Proportional to 28,631 and 42,117

Step by Step Solution

1. Step 1: Write the proportion equation
   28,631 : 42,117 = 42,117 : x
2. Step 2: Convert to fraction form
   28,631/42,117 = 42,117/x
3. Step 3: Cross multiply
   28,631x = 42,117 × 42,117
4. Step 4: Simplify right side
   28,631x = 1,773,841,689
5. Step 5: Solve for x
   x = 1,773,841,689/28,631
6. Step 6: Final answer
   x = 61,955.28