Finding the Fourth Proportional to 42,888.52, 64,405.86 and 27,921.13

Step by Step Solution

1. Step 1: Write the proportion equation
   42,888.52 : 64,405.86 = 27,921.13 : x
2. Step 2: Convert to fraction form
   42,888.52/64,405.86 = 27,921.13/x
3. Step 3: Cross multiply
   42,888.52x = 64,405.86 × 27,921.13
4. Step 4: Simplify right side
   42,888.52x = 1,798,284,389.82
5. Step 5: Solve for x
   x = 1,798,284,389.82/42,888.52
6. Step 6: Final answer
   x = 41,929.27