Finding the Third Proportional to 42,316.17 and 61,987.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,316.17 : 61,987.78 = 61,987.78 : x
2. Step 2: Convert to fraction form
   42,316.17/61,987.78 = 61,987.78/x
3. Step 3: Cross multiply
   42,316.17x = 61,987.78 × 61,987.78
4. Step 4: Simplify right side
   42,316.17x = 3,842,485,024.30
5. Step 5: Solve for x
   x = 3,842,485,024.30/42,316.17
6. Step 6: Final answer
   x = 90,804.17