Finding the Fourth Proportional to 56,945.09, 85,419.89 and 21,402.83

Step by Step Solution

1. Step 1: Write the proportion equation
   56,945.09 : 85,419.89 = 21,402.83 : x
2. Step 2: Convert to fraction form
   56,945.09/85,419.89 = 21,402.83/x
3. Step 3: Cross multiply
   56,945.09x = 85,419.89 × 21,402.83
4. Step 4: Simplify right side
   56,945.09x = 1,828,226,850.18
5. Step 5: Solve for x
   x = 1,828,226,850.18/56,945.09
6. Step 6: Final answer
   x = 32,105.09