Finding the Fourth Proportional to 42,761.18, 64,153.53 and 17,812.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,761.18 : 64,153.53 = 17,812.91 : x
2. Step 2: Convert to fraction form
   42,761.18/64,153.53 = 17,812.91/x
3. Step 3: Cross multiply
   42,761.18x = 64,153.53 × 17,812.91
4. Step 4: Simplify right side
   42,761.18x = 1,142,761,216.46
5. Step 5: Solve for x
   x = 1,142,761,216.46/42,761.18
6. Step 6: Final answer
   x = 26,724.27