Finding the Fourth Proportional to 64,345,063.78, 87,608,260.40 and 64,140,760.01

Step by Step Solution

1. Step 1: Write the proportion equation
   64,345,063.78 : 87,608,260.40 = 64,140,760.01 : x
2. Step 2: Convert to fraction form
   64,345,063.78/87,608,260.40 = 64,140,760.01/x
3. Step 3: Cross multiply
   64,345,063.78x = 87,608,260.40 × 64,140,760.01
4. Step 4: Simplify right side
   64,345,063.78x = 5,619,260,405,209,987
5. Step 5: Solve for x
   x = 5,619,260,405,209,987/64,345,063.78
6. Step 6: Final answer
   x = 87,330,093.02