Finding the Fourth Proportional to 78,564.56, 108,528.42 and 75,648.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,564.56 : 108,528.42 = 75,648.10 : x
2. Step 2: Convert to fraction form
   78,564.56/108,528.42 = 75,648.10/x
3. Step 3: Cross multiply
   78,564.56x = 108,528.42 × 75,648.10
4. Step 4: Simplify right side
   78,564.56x = 8,209,968,769.00
5. Step 5: Solve for x
   x = 8,209,968,769.00/78,564.56
6. Step 6: Final answer
   x = 104,499.65