Finding the Fourth Proportional to 56,721.02, 85,061.69 and 16,729.40

Step by Step Solution

1. Step 1: Write the proportion equation
   56,721.02 : 85,061.69 = 16,729.40 : x
2. Step 2: Convert to fraction form
   56,721.02/85,061.69 = 16,729.40/x
3. Step 3: Cross multiply
   56,721.02x = 85,061.69 × 16,729.40
4. Step 4: Simplify right side
   56,721.02x = 1,423,030,611.38
5. Step 5: Solve for x
   x = 1,423,030,611.38/56,721.02
6. Step 6: Final answer
   x = 25,088.24