Finding the Fourth Proportional to 10,070.68, 13,892.70 and 7,828.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,070.68 : 13,892.70 = 7,828.60 : x
2. Step 2: Convert to fraction form
   10,070.68/13,892.70 = 7,828.60/x
3. Step 3: Cross multiply
   10,070.68x = 13,892.70 × 7,828.60
4. Step 4: Simplify right side
   10,070.68x = 108,760,391.22
5. Step 5: Solve for x
   x = 108,760,391.22/10,070.68
6. Step 6: Final answer
   x = 10,799.71