Finding the Fourth Proportional to 73,117.76, 109,721.76 and 28,736.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73,117.76 : 109,721.76 = 28,736.72 : x
2. Step 2: Convert to fraction form
   73,117.76/109,721.76 = 28,736.72/x
3. Step 3: Cross multiply
   73,117.76x = 109,721.76 × 28,736.72
4. Step 4: Simplify right side
   73,117.76x = 3,153,043,495.03
5. Step 5: Solve for x
   x = 3,153,043,495.03/73,117.76
6. Step 6: Final answer
   x = 43,122.81