Finding the Fourth Proportional to 52,840.42, 72,919.79 and 28,966.59

Step by Step Solution

1. Step 1: Write the proportion equation
   52,840.42 : 72,919.79 = 28,966.59 : x
2. Step 2: Convert to fraction form
   52,840.42/72,919.79 = 28,966.59/x
3. Step 3: Cross multiply
   52,840.42x = 72,919.79 × 28,966.59
4. Step 4: Simplify right side
   52,840.42x = 2,112,237,659.82
5. Step 5: Solve for x
   x = 2,112,237,659.82/52,840.42
6. Step 6: Final answer
   x = 39,973.90