Finding the Fourth Proportional to 191,768.69, 287,664.38 and 58,658.15

Step by Step Solution

1. Step 1: Write the proportion equation
   191,768.69 : 287,664.38 = 58,658.15 : x
2. Step 2: Convert to fraction form
   191,768.69/287,664.38 = 58,658.15/x
3. Step 3: Cross multiply
   191,768.69x = 287,664.38 × 58,658.15
4. Step 4: Simplify right side
   191,768.69x = 16,873,860,997.54
5. Step 5: Solve for x
   x = 16,873,860,997.54/191,768.69
6. Step 6: Final answer
   x = 87,990.70