Finding the Third Proportional to 39,278 and 59,490

Step by Step Solution

1. Step 1: Write the proportion equation
   39,278 : 59,490 = 59,490 : x
2. Step 2: Convert to fraction form
   39,278/59,490 = 59,490/x
3. Step 3: Cross multiply
   39,278x = 59,490 × 59,490
4. Step 4: Simplify right side
   39,278x = 3,539,060,100
5. Step 5: Solve for x
   x = 3,539,060,100/39,278
6. Step 6: Final answer
   x = 90,102.86