Finding the Fourth Proportional to 78,698.68, 108,518.43 and 53,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,698.68 : 108,518.43 = 53,160.72 : x
2. Step 2: Convert to fraction form
   78,698.68/108,518.43 = 53,160.72/x
3. Step 3: Cross multiply
   78,698.68x = 108,518.43 × 53,160.72
4. Step 4: Simplify right side
   78,698.68x = 5,768,917,308.99
5. Step 5: Solve for x
   x = 5,768,917,308.99/78,698.68
6. Step 6: Final answer
   x = 73,303.86