Finding the Fourth Proportional to 56,019.25, 77,308.19 and 30,870.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,019.25 : 77,308.19 = 30,870.37 : x
2. Step 2: Convert to fraction form
   56,019.25/77,308.19 = 30,870.37/x
3. Step 3: Cross multiply
   56,019.25x = 77,308.19 × 30,870.37
4. Step 4: Simplify right side
   56,019.25x = 2,386,532,274.98
5. Step 5: Solve for x
   x = 2,386,532,274.98/56,019.25
6. Step 6: Final answer
   x = 42,602.00