Finding the Fourth Proportional to 42,406.40, 59,291.20 and 42,406.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,406.40 : 59,291.20 = 42,406.40 : x
2. Step 2: Convert to fraction form
   42,406.40/59,291.20 = 42,406.40/x
3. Step 3: Cross multiply
   42,406.40x = 59,291.20 × 42,406.40
4. Step 4: Simplify right side
   42,406.40x = 2,514,326,343.68
5. Step 5: Solve for x
   x = 2,514,326,343.68/42,406.40
6. Step 6: Final answer
   x = 59,291.20