Finding the Fourth Proportional to 55,978.91, 77,247.40 and 30,828.41

Step by Step Solution

1. Step 1: Write the proportion equation
   55,978.91 : 77,247.40 = 30,828.41 : x
2. Step 2: Convert to fraction form
   55,978.91/77,247.40 = 30,828.41/x
3. Step 3: Cross multiply
   55,978.91x = 77,247.40 × 30,828.41
4. Step 4: Simplify right side
   55,978.91x = 2,381,414,557.61
5. Step 5: Solve for x
   x = 2,381,414,557.61/55,978.91
6. Step 6: Final answer
   x = 42,541.28