Finding the Fourth Proportional to 42,861.11, 64,301.86 and 17,887.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,861.11 : 64,301.86 = 17,887.28 : x
2. Step 2: Convert to fraction form
   42,861.11/64,301.86 = 17,887.28/x
3. Step 3: Cross multiply
   42,861.11x = 64,301.86 × 17,887.28
4. Step 4: Simplify right side
   42,861.11x = 1,150,185,374.34
5. Step 5: Solve for x
   x = 1,150,185,374.34/42,861.11
6. Step 6: Final answer
   x = 26,835.17