Finding the Third Proportional to 5,578,368 and 8,613,603

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578,368 : 8,613,603 = 8,613,603 : x
2. Step 2: Convert to fraction form
   5,578,368/8,613,603 = 8,613,603/x
3. Step 3: Cross multiply
   5,578,368x = 8,613,603 × 8,613,603
4. Step 4: Simplify right side
   5,578,368x = 74,194,156,641,609
5. Step 5: Solve for x
   x = 74,194,156,641,609/5,578,368
6. Step 6: Final answer
   x = 13,300,333.83