Finding the Fourth Proportional to 115,781.34, 159,785.64 and 64,799.94

Step by Step Solution

1. Step 1: Write the proportion equation
   115,781.34 : 159,785.64 = 64,799.94 : x
2. Step 2: Convert to fraction form
   115,781.34/159,785.64 = 64,799.94/x
3. Step 3: Cross multiply
   115,781.34x = 159,785.64 × 64,799.94
4. Step 4: Simplify right side
   115,781.34x = 10,354,099,884.86
5. Step 5: Solve for x
   x = 10,354,099,884.86/115,781.34
6. Step 6: Final answer
   x = 89,428.05