Finding the Fourth Proportional to 52,071.61, 71,858.72 and 28,198.21

Step by Step Solution

1. Step 1: Write the proportion equation
   52,071.61 : 71,858.72 = 28,198.21 : x
2. Step 2: Convert to fraction form
   52,071.61/71,858.72 = 28,198.21/x
3. Step 3: Cross multiply
   52,071.61x = 71,858.72 × 28,198.21
4. Step 4: Simplify right side
   52,071.61x = 2,026,287,276.89
5. Step 5: Solve for x
   x = 2,026,287,276.89/52,071.61
6. Step 6: Final answer
   x = 38,913.47