Finding the Fourth Proportional to 31,122.85, 46,485.82 and 28,156.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,122.85 : 46,485.82 = 28,156.72 : x
2. Step 2: Convert to fraction form
   31,122.85/46,485.82 = 28,156.72/x
3. Step 3: Cross multiply
   31,122.85x = 46,485.82 × 28,156.72
4. Step 4: Simplify right side
   31,122.85x = 1,308,888,217.71
5. Step 5: Solve for x
   x = 1,308,888,217.71/31,122.85
6. Step 6: Final answer
   x = 42,055.54