Finding the Fourth Proportional to 84,607, 126,912.56 and 28,447.84

Step by Step Solution

1. Step 1: Write the proportion equation
   84,607 : 126,912.56 = 28,447.84 : x
2. Step 2: Convert to fraction form
   84,607/126,912.56 = 28,447.84/x
3. Step 3: Cross multiply
   84,607x = 126,912.56 × 28,447.84
4. Step 4: Simplify right side
   84,607x = 3,610,388,200.87
5. Step 5: Solve for x
   x = 3,610,388,200.87/84,607
6. Step 6: Final answer
   x = 42,672.45