Finding the Fourth Proportional to 42,948.72, 64,422.29 and 17,642.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,948.72 : 64,422.29 = 17,642.86 : x
2. Step 2: Convert to fraction form
   42,948.72/64,422.29 = 17,642.86/x
3. Step 3: Cross multiply
   42,948.72x = 64,422.29 × 17,642.86
4. Step 4: Simplify right side
   42,948.72x = 1,136,593,326.40
5. Step 5: Solve for x
   x = 1,136,593,326.40/42,948.72
6. Step 6: Final answer
   x = 26,463.96