Finding the Third Proportional to 56,130 and 122,830.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,130 : 122,830.50 = 122,830.50 : x
2. Step 2: Convert to fraction form
   56,130/122,830.50 = 122,830.50/x
3. Step 3: Cross multiply
   56,130x = 122,830.50 × 122,830.50
4. Step 4: Simplify right side
   56,130x = 15,087,331,730.25
5. Step 5: Solve for x
   x = 15,087,331,730.25/56,130
6. Step 6: Final answer
   x = 268,792.66