Finding the Third Proportional to 55,478.25 and 90,580.78

Step by Step Solution

1. Step 1: Write the proportion equation
   55,478.25 : 90,580.78 = 90,580.78 : x
2. Step 2: Convert to fraction form
   55,478.25/90,580.78 = 90,580.78/x
3. Step 3: Cross multiply
   55,478.25x = 90,580.78 × 90,580.78
4. Step 4: Simplify right side
   55,478.25x = 8,204,877,931.86
5. Step 5: Solve for x
   x = 8,204,877,931.86/55,478.25
6. Step 6: Final answer
   x = 147,893.60