Finding the Fourth Proportional to 78,488.64, 108,338.04 and 53,352.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,488.64 : 108,338.04 = 53,352.72 : x
2. Step 2: Convert to fraction form
   78,488.64/108,338.04 = 53,352.72/x
3. Step 3: Cross multiply
   78,488.64x = 108,338.04 × 53,352.72
4. Step 4: Simplify right side
   78,488.64x = 5,780,129,113.47
5. Step 5: Solve for x
   x = 5,780,129,113.47/78,488.64
6. Step 6: Final answer
   x = 73,642.88