Finding the Fourth Proportional to 93,388.61, 128,839.59 and 57,516.36

Step by Step Solution

1. Step 1: Write the proportion equation
   93,388.61 : 128,839.59 = 57,516.36 : x
2. Step 2: Convert to fraction form
   93,388.61/128,839.59 = 57,516.36/x
3. Step 3: Cross multiply
   93,388.61x = 128,839.59 × 57,516.36
4. Step 4: Simplify right side
   93,388.61x = 7,410,384,240.69
5. Step 5: Solve for x
   x = 7,410,384,240.69/93,388.61
6. Step 6: Final answer
   x = 79,349.98