Finding the Fourth Proportional to 91,426.90, 137,194.83 and 40,821.99

Step by Step Solution

1. Step 1: Write the proportion equation
   91,426.90 : 137,194.83 = 40,821.99 : x
2. Step 2: Convert to fraction form
   91,426.90/137,194.83 = 40,821.99/x
3. Step 3: Cross multiply
   91,426.90x = 137,194.83 × 40,821.99
4. Step 4: Simplify right side
   91,426.90x = 5,600,565,978.31
5. Step 5: Solve for x
   x = 5,600,565,978.31/91,426.90
6. Step 6: Final answer
   x = 61,257.31