Finding the Fourth Proportional to 21,381.57, 32,055.95 and 13,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,381.57 : 32,055.95 = 13,065.50 : x
2. Step 2: Convert to fraction form
   21,381.57/32,055.95 = 13,065.50/x
3. Step 3: Cross multiply
   21,381.57x = 32,055.95 × 13,065.50
4. Step 4: Simplify right side
   21,381.57x = 418,827,127.53
5. Step 5: Solve for x
   x = 418,827,127.53/21,381.57
6. Step 6: Final answer
   x = 19,588.23