Finding the Fourth Proportional to 64,345,064.78, 87,608,261.76 and 64,140,761.01

Step by Step Solution

1. Step 1: Write the proportion equation
   64,345,064.78 : 87,608,261.76 = 64,140,761.01 : x
2. Step 2: Convert to fraction form
   64,345,064.78/87,608,261.76 = 64,140,761.01/x
3. Step 3: Cross multiply
   64,345,064.78x = 87,608,261.76 × 64,140,761.01
4. Step 4: Simplify right side
   64,345,064.78x = 5,619,260,580,049,682
5. Step 5: Solve for x
   x = 5,619,260,580,049,682/64,345,064.78
6. Step 6: Final answer
   x = 87,330,094.38