Finding the Fourth Proportional to 114,826.72, 172,220.64 and 31,720.72

Step by Step Solution

1. Step 1: Write the proportion equation
   114,826.72 : 172,220.64 = 31,720.72 : x
2. Step 2: Convert to fraction form
   114,826.72/172,220.64 = 31,720.72/x
3. Step 3: Cross multiply
   114,826.72x = 172,220.64 × 31,720.72
4. Step 4: Simplify right side
   114,826.72x = 5,462,962,699.66
5. Step 5: Solve for x
   x = 5,462,962,699.66/114,826.72
6. Step 6: Final answer
   x = 47,575.71