Finding the Fourth Proportional to 62,978.15, 94,472.42 and 20,856.94

Step by Step Solution

1. Step 1: Write the proportion equation
   62,978.15 : 94,472.42 = 20,856.94 : x
2. Step 2: Convert to fraction form
   62,978.15/94,472.42 = 20,856.94/x
3. Step 3: Cross multiply
   62,978.15x = 94,472.42 × 20,856.94
4. Step 4: Simplify right side
   62,978.15x = 1,970,405,595.59
5. Step 5: Solve for x
   x = 1,970,405,595.59/62,978.15
6. Step 6: Final answer
   x = 31,287.13