Finding the Fourth Proportional to 50,435.60, 69,570.12 and 31,322

Step by Step Solution

1. Step 1: Write the proportion equation
   50,435.60 : 69,570.12 = 31,322 : x
2. Step 2: Convert to fraction form
   50,435.60/69,570.12 = 31,322/x
3. Step 3: Cross multiply
   50,435.60x = 69,570.12 × 31,322
4. Step 4: Simplify right side
   50,435.60x = 2,179,075,298.64
5. Step 5: Solve for x
   x = 2,179,075,298.64/50,435.60
6. Step 6: Final answer
   x = 43,205.10