Finding the Fourth Proportional to 28,892.16, 39,870.72 and 16,145.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,892.16 : 39,870.72 = 16,145.52 : x
2. Step 2: Convert to fraction form
   28,892.16/39,870.72 = 16,145.52/x
3. Step 3: Cross multiply
   28,892.16x = 39,870.72 × 16,145.52
4. Step 4: Simplify right side
   28,892.16x = 643,733,507.17
5. Step 5: Solve for x
   x = 643,733,507.17/28,892.16
6. Step 6: Final answer
   x = 22,280.56