Finding the Fourth Proportional to 56,821.72, 78,414.06 and 31,670.68

Step by Step Solution

1. Step 1: Write the proportion equation
   56,821.72 : 78,414.06 = 31,670.68 : x
2. Step 2: Convert to fraction form
   56,821.72/78,414.06 = 31,670.68/x
3. Step 3: Cross multiply
   56,821.72x = 78,414.06 × 31,670.68
4. Step 4: Simplify right side
   56,821.72x = 2,483,426,601.76
5. Step 5: Solve for x
   x = 2,483,426,601.76/56,821.72
6. Step 6: Final answer
   x = 43,705.59