Finding the Fourth Proportional to 83,785.54, 115,679.71 and 64,369.86

Step by Step Solution

1. Step 1: Write the proportion equation
   83,785.54 : 115,679.71 = 64,369.86 : x
2. Step 2: Convert to fraction form
   83,785.54/115,679.71 = 64,369.86/x
3. Step 3: Cross multiply
   83,785.54x = 115,679.71 × 64,369.86
4. Step 4: Simplify right side
   83,785.54x = 7,446,286,737.54
5. Step 5: Solve for x
   x = 7,446,286,737.54/83,785.54
6. Step 6: Final answer
   x = 88,873.17