Finding the Fourth Proportional to 42,904.64, 64,373.16 and 17,961.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,904.64 : 64,373.16 = 17,961.50 : x
2. Step 2: Convert to fraction form
   42,904.64/64,373.16 = 17,961.50/x
3. Step 3: Cross multiply
   42,904.64x = 64,373.16 × 17,961.50
4. Step 4: Simplify right side
   42,904.64x = 1,156,238,513.34
5. Step 5: Solve for x
   x = 1,156,238,513.34/42,904.64
6. Step 6: Final answer
   x = 26,949.03