Finding the Third Proportional to 58,620 and 90,904.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,620 : 90,904.50 = 90,904.50 : x
2. Step 2: Convert to fraction form
   58,620/90,904.50 = 90,904.50/x
3. Step 3: Cross multiply
   58,620x = 90,904.50 × 90,904.50
4. Step 4: Simplify right side
   58,620x = 8,263,628,120.25
5. Step 5: Solve for x
   x = 8,263,628,120.25/58,620
6. Step 6: Final answer
   x = 140,969.43