Finding the Fourth Proportional to 28,088.37, 42,139.86 and 14,047.83

Step by Step Solution

1. Step 1: Write the proportion equation
   28,088.37 : 42,139.86 = 14,047.83 : x
2. Step 2: Convert to fraction form
   28,088.37/42,139.86 = 14,047.83/x
3. Step 3: Cross multiply
   28,088.37x = 42,139.86 × 14,047.83
4. Step 4: Simplify right side
   28,088.37x = 591,973,589.50
5. Step 5: Solve for x
   x = 591,973,589.50/28,088.37
6. Step 6: Final answer
   x = 21,075.40