Finding the Fourth Proportional to 42,598.62, 63,907.32 and 13,018.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,598.62 : 63,907.32 = 13,018.77 : x
2. Step 2: Convert to fraction form
   42,598.62/63,907.32 = 13,018.77/x
3. Step 3: Cross multiply
   42,598.62x = 63,907.32 × 13,018.77
4. Step 4: Simplify right side
   42,598.62x = 831,994,700.40
5. Step 5: Solve for x
   x = 831,994,700.40/42,598.62
6. Step 6: Final answer
   x = 19,531.02