Finding the Fourth Proportional to 42,762.78, 64,156.05 and 17,814.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,762.78 : 64,156.05 = 17,814.60 : x
2. Step 2: Convert to fraction form
   42,762.78/64,156.05 = 17,814.60/x
3. Step 3: Cross multiply
   42,762.78x = 64,156.05 × 17,814.60
4. Step 4: Simplify right side
   42,762.78x = 1,142,914,368.33
5. Step 5: Solve for x
   x = 1,142,914,368.33/42,762.78
6. Step 6: Final answer
   x = 26,726.85