Finding the Fourth Proportional to 42,798.48, 64,220.10 and 17,516.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,798.48 : 64,220.10 = 17,516.76 : x
2. Step 2: Convert to fraction form
   42,798.48/64,220.10 = 17,516.76/x
3. Step 3: Cross multiply
   42,798.48x = 64,220.10 × 17,516.76
4. Step 4: Simplify right side
   42,798.48x = 1,124,927,870.89
5. Step 5: Solve for x
   x = 1,124,927,870.89/42,798.48
6. Step 6: Final answer
   x = 26,284.30