Finding the Fourth Proportional to 72,838.79, 109,271.96 and 28,462.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72,838.79 : 109,271.96 = 28,462.74 : x
2. Step 2: Convert to fraction form
   72,838.79/109,271.96 = 28,462.74/x
3. Step 3: Cross multiply
   72,838.79x = 109,271.96 × 28,462.74
4. Step 4: Simplify right side
   72,838.79x = 3,110,179,386.77
5. Step 5: Solve for x
   x = 3,110,179,386.77/72,838.79
6. Step 6: Final answer
   x = 42,699.49