Finding the Fourth Proportional to 42,899.16, 64,055.31 and 38,427.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,899.16 : 64,055.31 = 38,427.96 : x
2. Step 2: Convert to fraction form
   42,899.16/64,055.31 = 38,427.96/x
3. Step 3: Cross multiply
   42,899.16x = 64,055.31 × 38,427.96
4. Step 4: Simplify right side
   42,899.16x = 2,461,514,890.47
5. Step 5: Solve for x
   x = 2,461,514,890.47/42,899.16
6. Step 6: Final answer
   x = 57,379.09