Finding the Third Proportional to 12,113,064 and 18,618,613.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,113,064 : 18,618,613.50 = 18,618,613.50 : x
2. Step 2: Convert to fraction form
   12,113,064/18,618,613.50 = 18,618,613.50/x
3. Step 3: Cross multiply
   12,113,064x = 18,618,613.50 × 18,618,613.50
4. Step 4: Simplify right side
   12,113,064x = 346,652,768,662,382.25
5. Step 5: Solve for x
   x = 346,652,768,662,382.25/12,113,064
6. Step 6: Final answer
   x = 28,618,091.07