Finding the Fourth Proportional to 116,819,369.12, 161,215,740.60 and 64,608,389.12

Step by Step Solution

1. Step 1: Write the proportion equation
   116,819,369.12 : 161,215,740.60 = 64,608,389.12 : x
2. Step 2: Convert to fraction form
   116,819,369.12/161,215,740.60 = 64,608,389.12/x
3. Step 3: Cross multiply
   116,819,369.12x = 161,215,740.60 × 64,608,389.12
4. Step 4: Simplify right side
   116,819,369.12x = 10,415,889,300,953,782
5. Step 5: Solve for x
   x = 10,415,889,300,953,782/116,819,369.12
6. Step 6: Final answer
   x = 89,162,348.50