Finding the Fourth Proportional to 9,890.90, 14,837.81 and 2,870.00

Step by Step Solution

1. Step 1: Write the proportion equation
   9,890.90 : 14,837.81 = 2,870.00 : x
2. Step 2: Convert to fraction form
   9,890.90/14,837.81 = 2,870.00/x
3. Step 3: Cross multiply
   9,890.90x = 14,837.81 × 2,870.00
4. Step 4: Simplify right side
   9,890.90x = 42,584,486.11
5. Step 5: Solve for x
   x = 42,584,486.11/9,890.90
6. Step 6: Final answer
   x = 4,305.42