Finding the Fourth Proportional to 105,335.91, 157,980.72 and 30,439.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105,335.91 : 157,980.72 = 30,439.77 : x
2. Step 2: Convert to fraction form
   105,335.91/157,980.72 = 30,439.77/x
3. Step 3: Cross multiply
   105,335.91x = 157,980.72 × 30,439.77
4. Step 4: Simplify right side
   105,335.91x = 4,808,896,781.23
5. Step 5: Solve for x
   x = 4,808,896,781.23/105,335.91
6. Step 6: Final answer
   x = 45,652.97