Finding the Fourth Proportional to 78,053.85, 116,964.14 and 42,945.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,053.85 : 116,964.14 = 42,945.21 : x
2. Step 2: Convert to fraction form
   78,053.85/116,964.14 = 42,945.21/x
3. Step 3: Cross multiply
   78,053.85x = 116,964.14 × 42,945.21
4. Step 4: Simplify right side
   78,053.85x = 5,023,049,340.04
5. Step 5: Solve for x
   x = 5,023,049,340.04/78,053.85
6. Step 6: Final answer
   x = 64,353.64