Finding the Fourth Proportional to 56,109, 77,430.42 and 30,958.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,109 : 77,430.42 = 30,958.50 : x
2. Step 2: Convert to fraction form
   56,109/77,430.42 = 30,958.50/x
3. Step 3: Cross multiply
   56,109x = 77,430.42 × 30,958.50
4. Step 4: Simplify right side
   56,109x = 2,397,129,657.57
5. Step 5: Solve for x
   x = 2,397,129,657.57/56,109
6. Step 6: Final answer
   x = 42,722.73