Finding the Fourth Proportional to 31,347.34, 47,192.05 and 28,591.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,347.34 : 47,192.05 = 28,591.72 : x
2. Step 2: Convert to fraction form
   31,347.34/47,192.05 = 28,591.72/x
3. Step 3: Cross multiply
   31,347.34x = 47,192.05 × 28,591.72
4. Step 4: Simplify right side
   31,347.34x = 1,349,301,797.59
5. Step 5: Solve for x
   x = 1,349,301,797.59/31,347.34
6. Step 6: Final answer
   x = 43,043.59