Finding the Fourth Proportional to 72,713.94, 109,026.30 and 28,288.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,713.94 : 109,026.30 = 28,288.98 : x
2. Step 2: Convert to fraction form
   72,713.94/109,026.30 = 28,288.98/x
3. Step 3: Cross multiply
   72,713.94x = 109,026.30 × 28,288.98
4. Step 4: Simplify right side
   72,713.94x = 3,084,242,820.17
5. Step 5: Solve for x
   x = 3,084,242,820.17/72,713.94
6. Step 6: Final answer
   x = 42,416.11