Finding the Fourth Proportional to 83,718.42, 125,577.69 and 21,388.98

Step by Step Solution

1. Step 1: Write the proportion equation
   83,718.42 : 125,577.69 = 21,388.98 : x
2. Step 2: Convert to fraction form
   83,718.42/125,577.69 = 21,388.98/x
3. Step 3: Cross multiply
   83,718.42x = 125,577.69 × 21,388.98
4. Step 4: Simplify right side
   83,718.42x = 2,685,978,699.86
5. Step 5: Solve for x
   x = 2,685,978,699.86/83,718.42
6. Step 6: Final answer
   x = 32,083.49