Finding the Fourth Proportional to 79,780,609.89, 110,055,371.97 and 64,912,559.25

Step by Step Solution

1. Step 1: Write the proportion equation
   79,780,609.89 : 110,055,371.97 = 64,912,559.25 : x
2. Step 2: Convert to fraction form
   79,780,609.89/110,055,371.97 = 64,912,559.25/x
3. Step 3: Cross multiply
   79,780,609.89x = 110,055,371.97 × 64,912,559.25
4. Step 4: Simplify right side
   79,780,609.89x = 7,143,975,853,328,822
5. Step 5: Solve for x
   x = 7,143,975,853,328,822/79,780,609.89
6. Step 6: Final answer
   x = 89,545,264.99