Finding the Third Proportional to 39,389.63 and 57,391.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,389.63 : 57,391.88 = 57,391.88 : x
2. Step 2: Convert to fraction form
   39,389.63/57,391.88 = 57,391.88/x
3. Step 3: Cross multiply
   39,389.63x = 57,391.88 × 57,391.88
4. Step 4: Simplify right side
   39,389.63x = 3,293,827,316.02
5. Step 5: Solve for x
   x = 3,293,827,316.02/39,389.63
6. Step 6: Final answer
   x = 83,621.70