Finding the Fourth Proportional to 64,631.69, 89,155.31 and 38,783.56

Step by Step Solution

1. Step 1: Write the proportion equation
   64,631.69 : 89,155.31 = 38,783.56 : x
2. Step 2: Convert to fraction form
   64,631.69/89,155.31 = 38,783.56/x
3. Step 3: Cross multiply
   64,631.69x = 89,155.31 × 38,783.56
4. Step 4: Simplify right side
   64,631.69x = 3,457,759,868.93
5. Step 5: Solve for x
   x = 3,457,759,868.93/64,631.69
6. Step 6: Final answer
   x = 53,499.45