Finding the Fourth Proportional to 13,061.42, 19,554.87 and 8,670.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,061.42 : 19,554.87 = 8,670.14 : x
2. Step 2: Convert to fraction form
   13,061.42/19,554.87 = 8,670.14/x
3. Step 3: Cross multiply
   13,061.42x = 19,554.87 × 8,670.14
4. Step 4: Simplify right side
   13,061.42x = 169,543,460.58
5. Step 5: Solve for x
   x = 169,543,460.58/13,061.42
6. Step 6: Final answer
   x = 12,980.48