Finding the Fourth Proportional to 19,876.57, 29,814.71 and 5,085.45

Step by Step Solution

1. Step 1: Write the proportion equation
   19,876.57 : 29,814.71 = 5,085.45 : x
2. Step 2: Convert to fraction form
   19,876.57/29,814.71 = 5,085.45/x
3. Step 3: Cross multiply
   19,876.57x = 29,814.71 × 5,085.45
4. Step 4: Simplify right side
   19,876.57x = 151,621,191.54
5. Step 5: Solve for x
   x = 151,621,191.54/19,876.57
6. Step 6: Final answer
   x = 7,628.14