Finding the Fourth Proportional to 82,777.76, 114,291.89 and 64,648.91

Step by Step Solution

1. Step 1: Write the proportion equation
   82,777.76 : 114,291.89 = 64,648.91 : x
2. Step 2: Convert to fraction form
   82,777.76/114,291.89 = 64,648.91/x
3. Step 3: Cross multiply
   82,777.76x = 114,291.89 × 64,648.91
4. Step 4: Simplify right side
   82,777.76x = 7,388,845,215.64
5. Step 5: Solve for x
   x = 7,388,845,215.64/82,777.76
6. Step 6: Final answer
   x = 89,261.24