Finding the Fourth Proportional to 78,268.02, 108,019.62 and 51,432.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,268.02 : 108,019.62 = 51,432.72 : x
2. Step 2: Convert to fraction form
   78,268.02/108,019.62 = 51,432.72/x
3. Step 3: Cross multiply
   78,268.02x = 108,019.62 × 51,432.72
4. Step 4: Simplify right side
   78,268.02x = 5,555,742,869.97
5. Step 5: Solve for x
   x = 5,555,742,869.97/78,268.02
6. Step 6: Final answer
   x = 70,983.56