Finding the Fourth Proportional to 83,784.54, 115,678.33 and 64,368.86

Step by Step Solution

1. Step 1: Write the proportion equation
   83,784.54 : 115,678.33 = 64,368.86 : x
2. Step 2: Convert to fraction form
   83,784.54/115,678.33 = 64,368.86/x
3. Step 3: Cross multiply
   83,784.54x = 115,678.33 × 64,368.86
4. Step 4: Simplify right side
   83,784.54x = 7,446,082,678.92
5. Step 5: Solve for x
   x = 7,446,082,678.92/83,784.54
6. Step 6: Final answer
   x = 88,871.80