Finding the Fourth Proportional to 40,856.05, 56,387.91 and 38,187.91

Step by Step Solution

1. Step 1: Write the proportion equation
   40,856.05 : 56,387.91 = 38,187.91 : x
2. Step 2: Convert to fraction form
   40,856.05/56,387.91 = 38,187.91/x
3. Step 3: Cross multiply
   40,856.05x = 56,387.91 × 38,187.91
4. Step 4: Simplify right side
   40,856.05x = 2,153,336,432.17
5. Step 5: Solve for x
   x = 2,153,336,432.17/40,856.05
6. Step 6: Final answer
   x = 52,705.45