Finding the Fourth Proportional to 31,152.84, 42,990.79 and 17,005.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.84 : 42,990.79 = 17,005.70 : x
2. Step 2: Convert to fraction form
   31,152.84/42,990.79 = 17,005.70/x
3. Step 3: Cross multiply
   31,152.84x = 42,990.79 × 17,005.70
4. Step 4: Simplify right side
   31,152.84x = 731,088,477.50
5. Step 5: Solve for x
   x = 731,088,477.50/31,152.84
6. Step 6: Final answer
   x = 23,467.80