Finding the Fourth Proportional to 78,478.04, 108,315.40 and 46,640.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,478.04 : 108,315.40 = 46,640.78 : x
2. Step 2: Convert to fraction form
   78,478.04/108,315.40 = 46,640.78/x
3. Step 3: Cross multiply
   78,478.04x = 108,315.40 × 46,640.78
4. Step 4: Simplify right side
   78,478.04x = 5,051,914,083.83
5. Step 5: Solve for x
   x = 5,051,914,083.83/78,478.04
6. Step 6: Final answer
   x = 64,373.61