Finding the Fourth Proportional to 9,905.32, 14,857.42 and 2,790.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,905.32 : 14,857.42 = 2,790.02 : x
2. Step 2: Convert to fraction form
   9,905.32/14,857.42 = 2,790.02/x
3. Step 3: Cross multiply
   9,905.32x = 14,857.42 × 2,790.02
4. Step 4: Simplify right side
   9,905.32x = 41,452,498.95
5. Step 5: Solve for x
   x = 41,452,498.95/9,905.32
6. Step 6: Final answer
   x = 4,184.87