Finding the Fourth Proportional to 100,788.16, 139,093.41 and 57,774.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,788.16 : 139,093.41 = 57,774.82 : x
2. Step 2: Convert to fraction form
   100,788.16/139,093.41 = 57,774.82/x
3. Step 3: Cross multiply
   100,788.16x = 139,093.41 × 57,774.82
4. Step 4: Simplify right side
   100,788.16x = 8,036,096,725.94
5. Step 5: Solve for x
   x = 8,036,096,725.94/100,788.16
6. Step 6: Final answer
   x = 79,732.55