Finding the Fourth Proportional to 56,090.32, 84,110.83 and 21,005.37

Step by Step Solution

1. Step 1: Write the proportion equation
   56,090.32 : 84,110.83 = 21,005.37 : x
2. Step 2: Convert to fraction form
   56,090.32/84,110.83 = 21,005.37/x
3. Step 3: Cross multiply
   56,090.32x = 84,110.83 × 21,005.37
4. Step 4: Simplify right side
   56,090.32x = 1,766,779,052.64
5. Step 5: Solve for x
   x = 1,766,779,052.64/56,090.32
6. Step 6: Final answer
   x = 31,498.82