Finding the Fourth Proportional to 58,803.30, 87,760.56 and 53,128.20

Step by Step Solution

1. Step 1: Write the proportion equation
   58,803.30 : 87,760.56 = 53,128.20 : x
2. Step 2: Convert to fraction form
   58,803.30/87,760.56 = 53,128.20/x
3. Step 3: Cross multiply
   58,803.30x = 87,760.56 × 53,128.20
4. Step 4: Simplify right side
   58,803.30x = 4,662,560,583.79
5. Step 5: Solve for x
   x = 4,662,560,583.79/58,803.30
6. Step 6: Final answer
   x = 79,290.80