Finding the Fourth Proportional to 103,280.07, 142,529.33 and 57,960.83

Step by Step Solution

1. Step 1: Write the proportion equation
   103,280.07 : 142,529.33 = 57,960.83 : x
2. Step 2: Convert to fraction form
   103,280.07/142,529.33 = 57,960.83/x
3. Step 3: Cross multiply
   103,280.07x = 142,529.33 × 57,960.83
4. Step 4: Simplify right side
   103,280.07x = 8,261,117,263.69
5. Step 5: Solve for x
   x = 8,261,117,263.69/103,280.07
6. Step 6: Final answer
   x = 79,987.53