Finding the Fourth Proportional to 9,917.05, 14,875.59 and 7,420.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.05 : 14,875.59 = 7,420.84 : x
2. Step 2: Convert to fraction form
   9,917.05/14,875.59 = 7,420.84/x
3. Step 3: Cross multiply
   9,917.05x = 14,875.59 × 7,420.84
4. Step 4: Simplify right side
   9,917.05x = 110,389,373.30
5. Step 5: Solve for x
   x = 110,389,373.30/9,917.05
6. Step 6: Final answer
   x = 11,131.27