Finding the Fourth Proportional to 56,005.31, 77,284.55 and 30,511.55

Step by Step Solution

1. Step 1: Write the proportion equation
   56,005.31 : 77,284.55 = 30,511.55 : x
2. Step 2: Convert to fraction form
   56,005.31/77,284.55 = 30,511.55/x
3. Step 3: Cross multiply
   56,005.31x = 77,284.55 × 30,511.55
4. Step 4: Simplify right side
   56,005.31x = 2,358,071,681.04
5. Step 5: Solve for x
   x = 2,358,071,681.04/56,005.31
6. Step 6: Final answer
   x = 42,104.43