Finding the Fourth Proportional to 55,978.85, 77,247.31 and 30,828.35

Step by Step Solution

1. Step 1: Write the proportion equation
   55,978.85 : 77,247.31 = 30,828.35 : x
2. Step 2: Convert to fraction form
   55,978.85/77,247.31 = 30,828.35/x
3. Step 3: Cross multiply
   55,978.85x = 77,247.31 × 30,828.35
4. Step 4: Simplify right side
   55,978.85x = 2,381,406,935.61
5. Step 5: Solve for x
   x = 2,381,406,935.61/55,978.85
6. Step 6: Final answer
   x = 42,541.19