Finding the Fourth Proportional to 56,214.42, 77,580.81 and 31,068.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,214.42 : 77,580.81 = 31,068.78 : x
2. Step 2: Convert to fraction form
   56,214.42/77,580.81 = 31,068.78/x
3. Step 3: Cross multiply
   56,214.42x = 77,580.81 × 31,068.78
4. Step 4: Simplify right side
   56,214.42x = 2,410,341,118.11
5. Step 5: Solve for x
   x = 2,410,341,118.11/56,214.42
6. Step 6: Final answer
   x = 42,877.63