Finding the Fourth Proportional to 78,538.76, 108,342.18 and 46,685

Step by Step Solution

1. Step 1: Write the proportion equation
   78,538.76 : 108,342.18 = 46,685 : x
2. Step 2: Convert to fraction form
   78,538.76/108,342.18 = 46,685/x
3. Step 3: Cross multiply
   78,538.76x = 108,342.18 × 46,685
4. Step 4: Simplify right side
   78,538.76x = 5,057,954,673.30
5. Step 5: Solve for x
   x = 5,057,954,673.30/78,538.76
6. Step 6: Final answer
   x = 64,400.75