Finding the Fourth Proportional to 19,131.95, 28,698.16 and 5,091.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19,131.95 : 28,698.16 = 5,091.89 : x
2. Step 2: Convert to fraction form
   19,131.95/28,698.16 = 5,091.89/x
3. Step 3: Cross multiply
   19,131.95x = 28,698.16 × 5,091.89
4. Step 4: Simplify right side
   19,131.95x = 146,127,781.06
5. Step 5: Solve for x
   x = 146,127,781.06/19,131.95
6. Step 6: Final answer
   x = 7,637.89