Finding the Fourth Proportional to 105,392.12, 158,077.89 and 57,991.59

Step by Step Solution

1. Step 1: Write the proportion equation
   105,392.12 : 158,077.89 = 57,991.59 : x
2. Step 2: Convert to fraction form
   105,392.12/158,077.89 = 57,991.59/x
3. Step 3: Cross multiply
   105,392.12x = 158,077.89 × 57,991.59
4. Step 4: Simplify right side
   105,392.12x = 9,167,188,184.95
5. Step 5: Solve for x
   x = 9,167,188,184.95/105,392.12
6. Step 6: Final answer
   x = 86,981.73