Finding the Third Proportional to 56,916 and 85,557.38

Step by Step Solution

1. Step 1: Write the proportion equation
   56,916 : 85,557.38 = 85,557.38 : x
2. Step 2: Convert to fraction form
   56,916/85,557.38 = 85,557.38/x
3. Step 3: Cross multiply
   56,916x = 85,557.38 × 85,557.38
4. Step 4: Simplify right side
   56,916x = 7,320,064,416.89
5. Step 5: Solve for x
   x = 7,320,064,416.89/56,916
6. Step 6: Final answer
   x = 128,611.72