Finding the Fourth Proportional to 42,817.86, 64,182.83 and 21,718.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,817.86 : 64,182.83 = 21,718.98 : x
2. Step 2: Convert to fraction form
   42,817.86/64,182.83 = 21,718.98/x
3. Step 3: Cross multiply
   42,817.86x = 64,182.83 × 21,718.98
4. Step 4: Simplify right side
   42,817.86x = 1,393,985,492.52
5. Step 5: Solve for x
   x = 1,393,985,492.52/42,817.86
6. Step 6: Final answer
   x = 32,556.17