Finding the Fourth Proportional to 52,555.88, 72,513.56 and 31,320.12

Step by Step Solution

1. Step 1: Write the proportion equation
   52,555.88 : 72,513.56 = 31,320.12 : x
2. Step 2: Convert to fraction form
   52,555.88/72,513.56 = 31,320.12/x
3. Step 3: Cross multiply
   52,555.88x = 72,513.56 × 31,320.12
4. Step 4: Simplify right side
   52,555.88x = 2,271,133,400.83
5. Step 5: Solve for x
   x = 2,271,133,400.83/52,555.88
6. Step 6: Final answer
   x = 43,213.69