Finding the Fourth Proportional to 78,647.39, 108,557.12 and 53,511.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,647.39 : 108,557.12 = 53,511.47 : x
2. Step 2: Convert to fraction form
   78,647.39/108,557.12 = 53,511.47/x
3. Step 3: Cross multiply
   78,647.39x = 108,557.12 × 53,511.47
4. Step 4: Simplify right side
   78,647.39x = 5,809,050,802.61
5. Step 5: Solve for x
   x = 5,809,050,802.61/78,647.39
6. Step 6: Final answer
   x = 73,861.97