Finding the Third Proportional to 56,442.75 and 85,142.63

Step by Step Solution

1. Step 1: Write the proportion equation
   56,442.75 : 85,142.63 = 85,142.63 : x
2. Step 2: Convert to fraction form
   56,442.75/85,142.63 = 85,142.63/x
3. Step 3: Cross multiply
   56,442.75x = 85,142.63 × 85,142.63
4. Step 4: Simplify right side
   56,442.75x = 7,249,266,591.89
5. Step 5: Solve for x
   x = 7,249,266,591.89/56,442.75
6. Step 6: Final answer
   x = 128,435.74