Finding the Fourth Proportional to 64,345,061.78, 87,608,257.68 and 64,140,758.01

Step by Step Solution

1. Step 1: Write the proportion equation
   64,345,061.78 : 87,608,257.68 = 64,140,758.01 : x
2. Step 2: Convert to fraction form
   64,345,061.78/87,608,257.68 = 64,140,758.01/x
3. Step 3: Cross multiply
   64,345,061.78x = 87,608,257.68 × 64,140,758.01
4. Step 4: Simplify right side
   64,345,061.78x = 5,619,260,055,530,604
5. Step 5: Solve for x
   x = 5,619,260,055,530,604/64,345,061.78
6. Step 6: Final answer
   x = 87,330,090.30