Finding the Fourth Proportional to 78,309, 108,156.12 and 51,571.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309 : 108,156.12 = 51,571.02 : x
2. Step 2: Convert to fraction form
   78,309/108,156.12 = 51,571.02/x
3. Step 3: Cross multiply
   78,309x = 108,156.12 × 51,571.02
4. Step 4: Simplify right side
   78,309x = 5,577,721,427.64
5. Step 5: Solve for x
   x = 5,577,721,427.64/78,309
6. Step 6: Final answer
   x = 71,227.08