Finding the Fourth Proportional to 21,061.19, 29,030.43 and 18,328.73

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.19 : 29,030.43 = 18,328.73 : x
2. Step 2: Convert to fraction form
   21,061.19/29,030.43 = 18,328.73/x
3. Step 3: Cross multiply
   21,061.19x = 29,030.43 × 18,328.73
4. Step 4: Simplify right side
   21,061.19x = 532,091,081.78
5. Step 5: Solve for x
   x = 532,091,081.78/21,061.19
6. Step 6: Final answer
   x = 25,264.05