Finding the Fourth Proportional to 103,907.72, 143,389.78 and 58,585.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,907.72 : 143,389.78 = 58,585.30 : x
2. Step 2: Convert to fraction form
   103,907.72/143,389.78 = 58,585.30/x
3. Step 3: Cross multiply
   103,907.72x = 143,389.78 × 58,585.30
4. Step 4: Simplify right side
   103,907.72x = 8,400,533,278.23
5. Step 5: Solve for x
   x = 8,400,533,278.23/103,907.72
6. Step 6: Final answer
   x = 80,846.09