Finding the Fourth Proportional to 31,152.65, 42,990.89 and 17,005.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.65 : 42,990.89 = 17,005.86 : x
2. Step 2: Convert to fraction form
   31,152.65/42,990.89 = 17,005.86/x
3. Step 3: Cross multiply
   31,152.65x = 42,990.89 × 17,005.86
4. Step 4: Simplify right side
   31,152.65x = 731,096,971.59
5. Step 5: Solve for x
   x = 731,096,971.59/31,152.65
6. Step 6: Final answer
   x = 23,468.22