Finding the Third Proportional to 31,216 and 42,376

Step by Step Solution

1. Step 1: Write the proportion equation
   31,216 : 42,376 = 42,376 : x
2. Step 2: Convert to fraction form
   31,216/42,376 = 42,376/x
3. Step 3: Cross multiply
   31,216x = 42,376 × 42,376
4. Step 4: Simplify right side
   31,216x = 1,795,725,376
5. Step 5: Solve for x
   x = 1,795,725,376/31,216
6. Step 6: Final answer
   x = 57,525.80