Finding the Fourth Proportional to 28,068.12, 42,077.66 and 10,538.28

Step by Step Solution

1. Step 1: Write the proportion equation
   28,068.12 : 42,077.66 = 10,538.28 : x
2. Step 2: Convert to fraction form
   28,068.12/42,077.66 = 10,538.28/x
3. Step 3: Cross multiply
   28,068.12x = 42,077.66 × 10,538.28
4. Step 4: Simplify right side
   28,068.12x = 443,426,162.82
5. Step 5: Solve for x
   x = 443,426,162.82/28,068.12
6. Step 6: Final answer
   x = 15,798.21