Finding the Fourth Proportional to 42,588.64, 63,889.10 and 13,002.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,588.64 : 63,889.10 = 13,002.63 : x
2. Step 2: Convert to fraction form
   42,588.64/63,889.10 = 13,002.63/x
3. Step 3: Cross multiply
   42,588.64x = 63,889.10 × 13,002.63
4. Step 4: Simplify right side
   42,588.64x = 830,726,145.64
5. Step 5: Solve for x
   x = 830,726,145.64/42,588.64
6. Step 6: Final answer
   x = 19,505.82