Finding the Fourth Proportional to 72,799.47, 109,134.23 and 28,415.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,799.47 : 109,134.23 = 28,415.88 : x
2. Step 2: Convert to fraction form
   72,799.47/109,134.23 = 28,415.88/x
3. Step 3: Cross multiply
   72,799.47x = 109,134.23 × 28,415.88
4. Step 4: Simplify right side
   72,799.47x = 3,101,145,041.49
5. Step 5: Solve for x
   x = 3,101,145,041.49/72,799.47
6. Step 6: Final answer
   x = 42,598.46