Finding the Fourth Proportional to 52,742.71, 72,785.04 and 28,870.91

Step by Step Solution

1. Step 1: Write the proportion equation
   52,742.71 : 72,785.04 = 28,870.91 : x
2. Step 2: Convert to fraction form
   52,742.71/72,785.04 = 28,870.91/x
3. Step 3: Cross multiply
   52,742.71x = 72,785.04 × 28,870.91
4. Step 4: Simplify right side
   52,742.71x = 2,101,369,975.26
5. Step 5: Solve for x
   x = 2,101,369,975.26/52,742.71
6. Step 6: Final answer
   x = 39,841.91