Finding the Third Proportional to 66,613,992 and 99,920,658

Step by Step Solution

1. Step 1: Write the proportion equation
   66,613,992 : 99,920,658 = 99,920,658 : x
2. Step 2: Convert to fraction form
   66,613,992/99,920,658 = 99,920,658/x
3. Step 3: Cross multiply
   66,613,992x = 99,920,658 × 99,920,658
4. Step 4: Simplify right side
   66,613,992x = 9,984,137,895,152,964
5. Step 5: Solve for x
   x = 9,984,137,895,152,964/66,613,992
6. Step 6: Final answer
   x = 149,880,492.00