Finding the Fourth Proportional to 40,355.91, 60,543.59 and 12,653.91

Step by Step Solution

1. Step 1: Write the proportion equation
   40,355.91 : 60,543.59 = 12,653.91 : x
2. Step 2: Convert to fraction form
   40,355.91/60,543.59 = 12,653.91/x
3. Step 3: Cross multiply
   40,355.91x = 60,543.59 × 12,653.91
4. Step 4: Simplify right side
   40,355.91x = 766,113,075.67
5. Step 5: Solve for x
   x = 766,113,075.67/40,355.91
6. Step 6: Final answer
   x = 18,983.91