Finding the Fourth Proportional to 91,904.20, 137,823.90 and 42,008.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,904.20 : 137,823.90 = 42,008.20 : x
2. Step 2: Convert to fraction form
   91,904.20/137,823.90 = 42,008.20/x
3. Step 3: Cross multiply
   91,904.20x = 137,823.90 × 42,008.20
4. Step 4: Simplify right side
   91,904.20x = 5,789,733,955.98
5. Step 5: Solve for x
   x = 5,789,733,955.98/91,904.20
6. Step 6: Final answer
   x = 62,997.49