Finding the Fourth Proportional to 56,106.72, 84,141.82 and 18,656.70

Step by Step Solution

1. Step 1: Write the proportion equation
   56,106.72 : 84,141.82 = 18,656.70 : x
2. Step 2: Convert to fraction form
   56,106.72/84,141.82 = 18,656.70/x
3. Step 3: Cross multiply
   56,106.72x = 84,141.82 × 18,656.70
4. Step 4: Simplify right side
   56,106.72x = 1,569,808,693.19
5. Step 5: Solve for x
   x = 1,569,808,693.19/56,106.72
6. Step 6: Final answer
   x = 27,978.98