Finding the Fourth Proportional to 31,317.89, 43,225.20 and 28,796.00

Step by Step Solution

1. Step 1: Write the proportion equation
   31,317.89 : 43,225.20 = 28,796.00 : x
2. Step 2: Convert to fraction form
   31,317.89/43,225.20 = 28,796.00/x
3. Step 3: Cross multiply
   31,317.89x = 43,225.20 × 28,796.00
4. Step 4: Simplify right side
   31,317.89x = 1,244,712,643.07
5. Step 5: Solve for x
   x = 1,244,712,643.07/31,317.89
6. Step 6: Final answer
   x = 39,744.47