Finding the Fourth Proportional to 58,345.98, 80,348.05 and 50,685.78

Step by Step Solution

1. Step 1: Write the proportion equation
   58,345.98 : 80,348.05 = 50,685.78 : x
2. Step 2: Convert to fraction form
   58,345.98/80,348.05 = 50,685.78/x
3. Step 3: Cross multiply
   58,345.98x = 80,348.05 × 50,685.78
4. Step 4: Simplify right side
   58,345.98x = 4,072,503,332.30
5. Step 5: Solve for x
   x = 4,072,503,332.30/58,345.98
6. Step 6: Final answer
   x = 69,799.22