Finding the Fourth Proportional to 13,070.31, 19,610.61 and 7,808.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,070.31 : 19,610.61 = 7,808.20 : x
2. Step 2: Convert to fraction form
   13,070.31/19,610.61 = 7,808.20/x
3. Step 3: Cross multiply
   13,070.31x = 19,610.61 × 7,808.20
4. Step 4: Simplify right side
   13,070.31x = 153,123,486.69
5. Step 5: Solve for x
   x = 153,123,486.69/13,070.31
6. Step 6: Final answer
   x = 11,715.37