Finding the Fourth Proportional to 56,109.19, 77,432.30 and 30,960.31

Step by Step Solution

1. Step 1: Write the proportion equation
   56,109.19 : 77,432.30 = 30,960.31 : x
2. Step 2: Convert to fraction form
   56,109.19/77,432.30 = 30,960.31/x
3. Step 3: Cross multiply
   56,109.19x = 77,432.30 × 30,960.31
4. Step 4: Simplify right side
   56,109.19x = 2,397,327,895.83
5. Step 5: Solve for x
   x = 2,397,327,895.83/56,109.19
6. Step 6: Final answer
   x = 42,726.12