Finding the Third Proportional to 42,585.75 and 57,859.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,585.75 : 57,859.95 = 57,859.95 : x
2. Step 2: Convert to fraction form
   42,585.75/57,859.95 = 57,859.95/x
3. Step 3: Cross multiply
   42,585.75x = 57,859.95 × 57,859.95
4. Step 4: Simplify right side
   42,585.75x = 3,347,773,271.57
5. Step 5: Solve for x
   x = 3,347,773,271.57/42,585.75
6. Step 6: Final answer
   x = 78,612.52