Finding the Fourth Proportional to 70,406.07, 105,609.42 and 17,815.61

Step by Step Solution

1. Step 1: Write the proportion equation
   70,406.07 : 105,609.42 = 17,815.61 : x
2. Step 2: Convert to fraction form
   70,406.07/105,609.42 = 17,815.61/x
3. Step 3: Cross multiply
   70,406.07x = 105,609.42 × 17,815.61
4. Step 4: Simplify right side
   70,406.07x = 1,881,495,711.00
5. Step 5: Solve for x
   x = 1,881,495,711.00/70,406.07
6. Step 6: Final answer
   x = 26,723.49