Finding the Third Proportional to 12,658,688 and 19,613,516

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658,688 : 19,613,516 = 19,613,516 : x
2. Step 2: Convert to fraction form
   12,658,688/19,613,516 = 19,613,516/x
3. Step 3: Cross multiply
   12,658,688x = 19,613,516 × 19,613,516
4. Step 4: Simplify right side
   12,658,688x = 384,690,009,882,256
5. Step 5: Solve for x
   x = 384,690,009,882,256/12,658,688
6. Step 6: Final answer
   x = 30,389,406.07