Finding the Fourth Proportional to 76,468.16, 105,522.49 and 42,478.85

Step by Step Solution

1. Step 1: Write the proportion equation
   76,468.16 : 105,522.49 = 42,478.85 : x
2. Step 2: Convert to fraction form
   76,468.16/105,522.49 = 42,478.85/x
3. Step 3: Cross multiply
   76,468.16x = 105,522.49 × 42,478.85
4. Step 4: Simplify right side
   76,468.16x = 4,482,474,024.34
5. Step 5: Solve for x
   x = 4,482,474,024.34/76,468.16
6. Step 6: Final answer
   x = 58,618.83