Finding the Fourth Proportional to 19,967.80, 29,931.72 and 10,077.16

Step by Step Solution

1. Step 1: Write the proportion equation
   19,967.80 : 29,931.72 = 10,077.16 : x
2. Step 2: Convert to fraction form
   19,967.80/29,931.72 = 10,077.16/x
3. Step 3: Cross multiply
   19,967.80x = 29,931.72 × 10,077.16
4. Step 4: Simplify right side
   19,967.80x = 301,626,731.52
5. Step 5: Solve for x
   x = 301,626,731.52/19,967.80
6. Step 6: Final answer
   x = 15,105.66