Finding the Fourth Proportional to 72,356.87, 99,855.56 and 42,137.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,356.87 : 99,855.56 = 42,137.32 : x
2. Step 2: Convert to fraction form
   72,356.87/99,855.56 = 42,137.32/x
3. Step 3: Cross multiply
   72,356.87x = 99,855.56 × 42,137.32
4. Step 4: Simplify right side
   72,356.87x = 4,207,645,685.50
5. Step 5: Solve for x
   x = 4,207,645,685.50/72,356.87
6. Step 6: Final answer
   x = 58,151.29