Finding the Fourth Proportional to 55,504.34, 76,502.70 and 42,071.30

Step by Step Solution

1. Step 1: Write the proportion equation
   55,504.34 : 76,502.70 = 42,071.30 : x
2. Step 2: Convert to fraction form
   55,504.34/76,502.70 = 42,071.30/x
3. Step 3: Cross multiply
   55,504.34x = 76,502.70 × 42,071.30
4. Step 4: Simplify right side
   55,504.34x = 3,218,568,042.51
5. Step 5: Solve for x
   x = 3,218,568,042.51/55,504.34
6. Step 6: Final answer
   x = 57,987.68