Finding the Fourth Proportional to 57,736.32, 86,534.72 and 28,109.76

Step by Step Solution

1. Step 1: Write the proportion equation
   57,736.32 : 86,534.72 = 28,109.76 : x
2. Step 2: Convert to fraction form
   57,736.32/86,534.72 = 28,109.76/x
3. Step 3: Cross multiply
   57,736.32x = 86,534.72 × 28,109.76
4. Step 4: Simplify right side
   57,736.32x = 2,432,470,210.87
5. Step 5: Solve for x
   x = 2,432,470,210.87/57,736.32
6. Step 6: Final answer
   x = 42,130.68