Finding the Third Proportional to 64,575,980 and 99,391,488

Step by Step Solution

1. Step 1: Write the proportion equation
   64,575,980 : 99,391,488 = 99,391,488 : x
2. Step 2: Convert to fraction form
   64,575,980/99,391,488 = 99,391,488/x
3. Step 3: Cross multiply
   64,575,980x = 99,391,488 × 99,391,488
4. Step 4: Simplify right side
   64,575,980x = 9,878,667,886,854,144
5. Step 5: Solve for x
   x = 9,878,667,886,854,144/64,575,980
6. Step 6: Final answer
   x = 152,977,436.61