Finding the Fourth Proportional to 260,453.22, 390,738.69 and 82,970.34

Step by Step Solution

1. Step 1: Write the proportion equation
   260,453.22 : 390,738.69 = 82,970.34 : x
2. Step 2: Convert to fraction form
   260,453.22/390,738.69 = 82,970.34/x
3. Step 3: Cross multiply
   260,453.22x = 390,738.69 × 82,970.34
4. Step 4: Simplify right side
   260,453.22x = 32,419,721,960.45
5. Step 5: Solve for x
   x = 32,419,721,960.45/260,453.22
6. Step 6: Final answer
   x = 124,474.26