Finding the Fourth Proportional to 19,903.13, 29,855.00 and 5,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,903.13 : 29,855.00 = 5,111.72 : x
2. Step 2: Convert to fraction form
   19,903.13/29,855.00 = 5,111.72/x
3. Step 3: Cross multiply
   19,903.13x = 29,855.00 × 5,111.72
4. Step 4: Simplify right side
   19,903.13x = 152,610,488.02
5. Step 5: Solve for x
   x = 152,610,488.02/19,903.13
6. Step 6: Final answer
   x = 7,667.66