Finding the Fourth Proportional to 19,166.82, 28,748.07 and 5,128.32

Step by Step Solution

1. Step 1: Write the proportion equation
   19,166.82 : 28,748.07 = 5,128.32 : x
2. Step 2: Convert to fraction form
   19,166.82/28,748.07 = 5,128.32/x
3. Step 3: Cross multiply
   19,166.82x = 28,748.07 × 5,128.32
4. Step 4: Simplify right side
   19,166.82x = 147,429,302.34
5. Step 5: Solve for x
   x = 147,429,302.34/19,166.82
6. Step 6: Final answer
   x = 7,691.90