Finding the Fourth Proportional to 58,561.37, 87,929.54 and 57,686.57

Step by Step Solution

1. Step 1: Write the proportion equation
   58,561.37 : 87,929.54 = 57,686.57 : x
2. Step 2: Convert to fraction form
   58,561.37/87,929.54 = 57,686.57/x
3. Step 3: Cross multiply
   58,561.37x = 87,929.54 × 57,686.57
4. Step 4: Simplify right side
   58,561.37x = 5,072,353,275.84
5. Step 5: Solve for x
   x = 5,072,353,275.84/58,561.37
6. Step 6: Final answer
   x = 86,616.03