Finding the Fourth Proportional to 28,106.34, 42,155.25 and 10,572.06

Step by Step Solution

1. Step 1: Write the proportion equation
   28,106.34 : 42,155.25 = 10,572.06 : x
2. Step 2: Convert to fraction form
   28,106.34/42,155.25 = 10,572.06/x
3. Step 3: Cross multiply
   28,106.34x = 42,155.25 × 10,572.06
4. Step 4: Simplify right side
   28,106.34x = 445,667,832.32
5. Step 5: Solve for x
   x = 445,667,832.32/28,106.34
6. Step 6: Final answer
   x = 15,856.49