Finding the Fourth Proportional to 56,112.88, 77,435.82 and 30,619.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,112.88 : 77,435.82 = 30,619.30 : x
2. Step 2: Convert to fraction form
   56,112.88/77,435.82 = 30,619.30/x
3. Step 3: Cross multiply
   56,112.88x = 77,435.82 × 30,619.30
4. Step 4: Simplify right side
   56,112.88x = 2,371,030,603.33
5. Step 5: Solve for x
   x = 2,371,030,603.33/56,112.88
6. Step 6: Final answer
   x = 42,254.66