Finding the Fourth Proportional to 70,287.98, 105,431.88 and 17,697.47

Step by Step Solution

1. Step 1: Write the proportion equation
   70,287.98 : 105,431.88 = 17,697.47 : x
2. Step 2: Convert to fraction form
   70,287.98/105,431.88 = 17,697.47/x
3. Step 3: Cross multiply
   70,287.98x = 105,431.88 × 17,697.47
4. Step 4: Simplify right side
   70,287.98x = 1,865,877,533.34
5. Step 5: Solve for x
   x = 1,865,877,533.34/70,287.98
6. Step 6: Final answer
   x = 26,546.18