Finding the Fourth Proportional to 56,085.58, 84,128.89 and 16,642.70

Step by Step Solution

1. Step 1: Write the proportion equation
   56,085.58 : 84,128.89 = 16,642.70 : x
2. Step 2: Convert to fraction form
   56,085.58/84,128.89 = 16,642.70/x
3. Step 3: Cross multiply
   56,085.58x = 84,128.89 × 16,642.70
4. Step 4: Simplify right side
   56,085.58x = 1,400,131,877.60
5. Step 5: Solve for x
   x = 1,400,131,877.60/56,085.58
6. Step 6: Final answer
   x = 24,964.20