Finding the Fourth Proportional to 55,840.32, 77,058.72 and 30,689.28

Step by Step Solution

1. Step 1: Write the proportion equation
   55,840.32 : 77,058.72 = 30,689.28 : x
2. Step 2: Convert to fraction form
   55,840.32/77,058.72 = 30,689.28/x
3. Step 3: Cross multiply
   55,840.32x = 77,058.72 × 30,689.28
4. Step 4: Simplify right side
   55,840.32x = 2,364,876,634.52
5. Step 5: Solve for x
   x = 2,364,876,634.52/55,840.32
6. Step 6: Final answer
   x = 42,350.70