Finding the Fourth Proportional to 10,131.51, 13,981.58 and 5,655.45

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.51 : 13,981.58 = 5,655.45 : x
2. Step 2: Convert to fraction form
   10,131.51/13,981.58 = 5,655.45/x
3. Step 3: Cross multiply
   10,131.51x = 13,981.58 × 5,655.45
4. Step 4: Simplify right side
   10,131.51x = 79,072,126.61
5. Step 5: Solve for x
   x = 79,072,126.61/10,131.51
6. Step 6: Final answer
   x = 7,804.57