Finding the Fourth Proportional to 52,782.34, 72,839.62 and 28,909.07

Step by Step Solution

1. Step 1: Write the proportion equation
   52,782.34 : 72,839.62 = 28,909.07 : x
2. Step 2: Convert to fraction form
   52,782.34/72,839.62 = 28,909.07/x
3. Step 3: Cross multiply
   52,782.34x = 72,839.62 × 28,909.07
4. Step 4: Simplify right side
   52,782.34x = 2,105,725,528.81
5. Step 5: Solve for x
   x = 2,105,725,528.81/52,782.34
6. Step 6: Final answer
   x = 39,894.51