Finding the Fourth Proportional to 52,783.83, 72,838.96 and 28,905.91

Step by Step Solution

1. Step 1: Write the proportion equation
   52,783.83 : 72,838.96 = 28,905.91 : x
2. Step 2: Convert to fraction form
   52,783.83/72,838.96 = 28,905.91/x
3. Step 3: Cross multiply
   52,783.83x = 72,838.96 × 28,905.91
4. Step 4: Simplify right side
   52,783.83x = 2,105,476,167.89
5. Step 5: Solve for x
   x = 2,105,476,167.89/52,783.83
6. Step 6: Final answer
   x = 39,888.66