Finding the Fourth Proportional to 19,359.93, 29,036.42 and 5,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,359.93 : 29,036.42 = 5,128.50 : x
2. Step 2: Convert to fraction form
   19,359.93/29,036.42 = 5,128.50/x
3. Step 3: Cross multiply
   19,359.93x = 29,036.42 × 5,128.50
4. Step 4: Simplify right side
   19,359.93x = 148,913,254.33
5. Step 5: Solve for x
   x = 148,913,254.33/19,359.93
6. Step 6: Final answer
   x = 7,691.83