Finding the Fourth Proportional to 91,971.48, 137,859.16 and 52,443.48

Step by Step Solution

1. Step 1: Write the proportion equation
   91,971.48 : 137,859.16 = 52,443.48 : x
2. Step 2: Convert to fraction form
   91,971.48/137,859.16 = 52,443.48/x
3. Step 3: Cross multiply
   91,971.48x = 137,859.16 × 52,443.48
4. Step 4: Simplify right side
   91,971.48x = 7,229,814,100.28
5. Step 5: Solve for x
   x = 7,229,814,100.28/91,971.48
6. Step 6: Final answer
   x = 78,609.30