Finding the Fourth Proportional to 31,491.72, 43,454.88 and 17,878.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,491.72 : 43,454.88 = 17,878.86 : x
2. Step 2: Convert to fraction form
   31,491.72/43,454.88 = 17,878.86/x
3. Step 3: Cross multiply
   31,491.72x = 43,454.88 × 17,878.86
4. Step 4: Simplify right side
   31,491.72x = 776,923,715.84
5. Step 5: Solve for x
   x = 776,923,715.84/31,491.72
6. Step 6: Final answer
   x = 24,670.73