Finding the Third Proportional to 58,387.50 and 90,591.75

Step by Step Solution

1. Step 1: Write the proportion equation
   58,387.50 : 90,591.75 = 90,591.75 : x
2. Step 2: Convert to fraction form
   58,387.50/90,591.75 = 90,591.75/x
3. Step 3: Cross multiply
   58,387.50x = 90,591.75 × 90,591.75
4. Step 4: Simplify right side
   58,387.50x = 8,206,865,168.06
5. Step 5: Solve for x
   x = 8,206,865,168.06/58,387.50
6. Step 6: Final answer
   x = 140,558.60