Finding the Fourth Proportional to 85,300.47, 127,922.99 and 28,359.05

Step by Step Solution

1. Step 1: Write the proportion equation
   85,300.47 : 127,922.99 = 28,359.05 : x
2. Step 2: Convert to fraction form
   85,300.47/127,922.99 = 28,359.05/x
3. Step 3: Cross multiply
   85,300.47x = 127,922.99 × 28,359.05
4. Step 4: Simplify right side
   85,300.47x = 3,627,773,688.15
5. Step 5: Solve for x
   x = 3,627,773,688.15/85,300.47
6. Step 6: Final answer
   x = 42,529.35