Finding the Fourth Proportional to 42,714.07, 64,077.23 and 13,134.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,714.07 : 64,077.23 = 13,134.40 : x
2. Step 2: Convert to fraction form
   42,714.07/64,077.23 = 13,134.40/x
3. Step 3: Cross multiply
   42,714.07x = 64,077.23 × 13,134.40
4. Step 4: Simplify right side
   42,714.07x = 841,615,842.35
5. Step 5: Solve for x
   x = 841,615,842.35/42,714.07
6. Step 6: Final answer
   x = 19,703.48