Finding the Fourth Proportional to 68,780.63, 103,018.53 and 52,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   68,780.63 : 103,018.53 = 52,868.50 : x
2. Step 2: Convert to fraction form
   68,780.63/103,018.53 = 52,868.50/x
3. Step 3: Cross multiply
   68,780.63x = 103,018.53 × 52,868.50
4. Step 4: Simplify right side
   68,780.63x = 5,446,435,153.31
5. Step 5: Solve for x
   x = 5,446,435,153.31/68,780.63
6. Step 6: Final answer
   x = 79,185.60