Finding the Fourth Proportional to 87,649.73, 120,969.59 and 64,956.87

Step by Step Solution

1. Step 1: Write the proportion equation
   87,649.73 : 120,969.59 = 64,956.87 : x
2. Step 2: Convert to fraction form
   87,649.73/120,969.59 = 64,956.87/x
3. Step 3: Cross multiply
   87,649.73x = 120,969.59 × 64,956.87
4. Step 4: Simplify right side
   87,649.73x = 7,857,805,931.58
5. Step 5: Solve for x
   x = 7,857,805,931.58/87,649.73
6. Step 6: Final answer
   x = 89,650.09