Finding the Fourth Proportional to 19,088.22, 28,640.82 and 7,402.34

Step by Step Solution

1. Step 1: Write the proportion equation
   19,088.22 : 28,640.82 = 7,402.34 : x
2. Step 2: Convert to fraction form
   19,088.22/28,640.82 = 7,402.34/x
3. Step 3: Cross multiply
   19,088.22x = 28,640.82 × 7,402.34
4. Step 4: Simplify right side
   19,088.22x = 212,009,087.52
5. Step 5: Solve for x
   x = 212,009,087.52/19,088.22
6. Step 6: Final answer
   x = 11,106.80