Finding the Fourth Proportional to 78,605.56, 108,440.62 and 53,103.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,605.56 : 108,440.62 = 53,103.72 : x
2. Step 2: Convert to fraction form
   78,605.56/108,440.62 = 53,103.72/x
3. Step 3: Cross multiply
   78,605.56x = 108,440.62 × 53,103.72
4. Step 4: Simplify right side
   78,605.56x = 5,758,600,321.11
5. Step 5: Solve for x
   x = 5,758,600,321.11/78,605.56
6. Step 6: Final answer
   x = 73,259.45