Finding the Fourth Proportional to 52,853.34, 72,938.61 and 28,978.59

Step by Step Solution

1. Step 1: Write the proportion equation
   52,853.34 : 72,938.61 = 28,978.59 : x
2. Step 2: Convert to fraction form
   52,853.34/72,938.61 = 28,978.59/x
3. Step 3: Cross multiply
   52,853.34x = 72,938.61 × 28,978.59
4. Step 4: Simplify right side
   52,853.34x = 2,113,658,074.36
5. Step 5: Solve for x
   x = 2,113,658,074.36/52,853.34
6. Step 6: Final answer
   x = 39,991.00