Finding the Fourth Proportional to 28,345.94, 42,519.31 and 9,877.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,345.94 : 42,519.31 = 9,877.94 : x
2. Step 2: Convert to fraction form
   28,345.94/42,519.31 = 9,877.94/x
3. Step 3: Cross multiply
   28,345.94x = 42,519.31 × 9,877.94
4. Step 4: Simplify right side
   28,345.94x = 420,003,193.02
5. Step 5: Solve for x
   x = 420,003,193.02/28,345.94
6. Step 6: Final answer
   x = 14,817.05