Finding the Fourth Proportional to 42,988.13, 64,517.73 and 21,943.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,988.13 : 64,517.73 = 21,943.72 : x
2. Step 2: Convert to fraction form
   42,988.13/64,517.73 = 21,943.72/x
3. Step 3: Cross multiply
   42,988.13x = 64,517.73 × 21,943.72
4. Step 4: Simplify right side
   42,988.13x = 1,415,759,002.16
5. Step 5: Solve for x
   x = 1,415,759,002.16/42,988.13
6. Step 6: Final answer
   x = 32,933.72