Finding the Third Proportional to 56,176.88 and 85,415.34

Step by Step Solution

1. Step 1: Write the proportion equation
   56,176.88 : 85,415.34 = 85,415.34 : x
2. Step 2: Convert to fraction form
   56,176.88/85,415.34 = 85,415.34/x
3. Step 3: Cross multiply
   56,176.88x = 85,415.34 × 85,415.34
4. Step 4: Simplify right side
   56,176.88x = 7,295,780,947.93
5. Step 5: Solve for x
   x = 7,295,780,947.93/56,176.88
6. Step 6: Final answer
   x = 129,871.61