Finding the Fourth Proportional to 101,359.47, 139,890 and 58,338.09

Step by Step Solution

1. Step 1: Write the proportion equation
   101,359.47 : 139,890 = 58,338.09 : x
2. Step 2: Convert to fraction form
   101,359.47/139,890 = 58,338.09/x
3. Step 3: Cross multiply
   101,359.47x = 139,890 × 58,338.09
4. Step 4: Simplify right side
   101,359.47x = 8,160,915,410.10
5. Step 5: Solve for x
   x = 8,160,915,410.10/101,359.47
6. Step 6: Final answer
   x = 80,514.58