Finding the Fourth Proportional to 56,141.98, 84,188.32 and 21,057.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,141.98 : 84,188.32 = 21,057.04 : x
2. Step 2: Convert to fraction form
   56,141.98/84,188.32 = 21,057.04/x
3. Step 3: Cross multiply
   56,141.98x = 84,188.32 × 21,057.04
4. Step 4: Simplify right side
   56,141.98x = 1,772,756,821.77
5. Step 5: Solve for x
   x = 1,772,756,821.77/56,141.98
6. Step 6: Final answer
   x = 31,576.31