Finding the Fourth Proportional to 83,945.27, 115,900.28 and 64,529.77

Step by Step Solution

1. Step 1: Write the proportion equation
   83,945.27 : 115,900.28 = 64,529.77 : x
2. Step 2: Convert to fraction form
   83,945.27/115,900.28 = 64,529.77/x
3. Step 3: Cross multiply
   83,945.27x = 115,900.28 × 64,529.77
4. Step 4: Simplify right side
   83,945.27x = 7,479,018,411.34
5. Step 5: Solve for x
   x = 7,479,018,411.34/83,945.27
6. Step 6: Final answer
   x = 89,093.98