Finding the Fourth Proportional to 42,780.36, 64,408.35 and 37,065

Step by Step Solution

1. Step 1: Write the proportion equation
   42,780.36 : 64,408.35 = 37,065 : x
2. Step 2: Convert to fraction form
   42,780.36/64,408.35 = 37,065/x
3. Step 3: Cross multiply
   42,780.36x = 64,408.35 × 37,065
4. Step 4: Simplify right side
   42,780.36x = 2,387,295,492.75
5. Step 5: Solve for x
   x = 2,387,295,492.75/42,780.36
6. Step 6: Final answer
   x = 55,803.54