Finding the Fourth Proportional to 51,090.86, 70,504.71 and 28,734.86

Step by Step Solution

1. Step 1: Write the proportion equation
   51,090.86 : 70,504.71 = 28,734.86 : x
2. Step 2: Convert to fraction form
   51,090.86/70,504.71 = 28,734.86/x
3. Step 3: Cross multiply
   51,090.86x = 70,504.71 × 28,734.86
4. Step 4: Simplify right side
   51,090.86x = 2,025,942,971.19
5. Step 5: Solve for x
   x = 2,025,942,971.19/51,090.86
6. Step 6: Final answer
   x = 39,653.73