Finding the Fourth Proportional to 9,870.30, 14,817.15 and 7,791.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.30 : 14,817.15 = 7,791.75 : x
2. Step 2: Convert to fraction form
   9,870.30/14,817.15 = 7,791.75/x
3. Step 3: Cross multiply
   9,870.30x = 14,817.15 × 7,791.75
4. Step 4: Simplify right side
   9,870.30x = 115,451,528.51
5. Step 5: Solve for x
   x = 115,451,528.51/9,870.30
6. Step 6: Final answer
   x = 11,696.86