Finding the Fourth Proportional to 78,240.72, 107,969.28 and 46,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,240.72 : 107,969.28 = 46,390.56 : x
2. Step 2: Convert to fraction form
   78,240.72/107,969.28 = 46,390.56/x
3. Step 3: Cross multiply
   78,240.72x = 107,969.28 × 46,390.56
4. Step 4: Simplify right side
   78,240.72x = 5,008,755,362.00
5. Step 5: Solve for x
   x = 5,008,755,362.00/78,240.72
6. Step 6: Final answer
   x = 64,017.25