Finding the Fourth Proportional to 78,017.52, 107,676.24 and 51,237.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,017.52 : 107,676.24 = 51,237.72 : x
2. Step 2: Convert to fraction form
   78,017.52/107,676.24 = 51,237.72/x
3. Step 3: Cross multiply
   78,017.52x = 107,676.24 × 51,237.72
4. Step 4: Simplify right side
   78,017.52x = 5,517,085,035.77
5. Step 5: Solve for x
   x = 5,517,085,035.77/78,017.52
6. Step 6: Final answer
   x = 70,715.98