Finding the Fourth Proportional to 10,131.51, 13,980.87 and 5,655.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.51 : 13,980.87 = 5,655.05 : x
2. Step 2: Convert to fraction form
   10,131.51/13,980.87 = 5,655.05/x
3. Step 3: Cross multiply
   10,131.51x = 13,980.87 × 5,655.05
4. Step 4: Simplify right side
   10,131.51x = 79,062,448.99
5. Step 5: Solve for x
   x = 79,062,448.99/10,131.51
6. Step 6: Final answer
   x = 7,803.62