Finding the Fourth Proportional to 52,809.90, 72,870.72 and 31,581.42

Step by Step Solution

1. Step 1: Write the proportion equation
   52,809.90 : 72,870.72 = 31,581.42 : x
2. Step 2: Convert to fraction form
   52,809.90/72,870.72 = 31,581.42/x
3. Step 3: Cross multiply
   52,809.90x = 72,870.72 × 31,581.42
4. Step 4: Simplify right side
   52,809.90x = 2,301,360,814.02
5. Step 5: Solve for x
   x = 2,301,360,814.02/52,809.90
6. Step 6: Final answer
   x = 43,578.21