Finding the Fourth Proportional to 58,309.80, 80,385.38 and 49,320.96

Step by Step Solution

1. Step 1: Write the proportion equation
   58,309.80 : 80,385.38 = 49,320.96 : x
2. Step 2: Convert to fraction form
   58,309.80/80,385.38 = 49,320.96/x
3. Step 3: Cross multiply
   58,309.80x = 80,385.38 × 49,320.96
4. Step 4: Simplify right side
   58,309.80x = 3,964,684,111.56
5. Step 5: Solve for x
   x = 3,964,684,111.56/58,309.80
6. Step 6: Final answer
   x = 67,993.44