Finding the Fourth Proportional to 58,196.64, 80,421.60 and 49,581.36

Step by Step Solution

1. Step 1: Write the proportion equation
   58,196.64 : 80,421.60 = 49,581.36 : x
2. Step 2: Convert to fraction form
   58,196.64/80,421.60 = 49,581.36/x
3. Step 3: Cross multiply
   58,196.64x = 80,421.60 × 49,581.36
4. Step 4: Simplify right side
   58,196.64x = 3,987,412,301.38
5. Step 5: Solve for x
   x = 3,987,412,301.38/58,196.64
6. Step 6: Final answer
   x = 68,516.19