Finding the Fourth Proportional to 76,490.40, 105,553.32 and 42,501.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,490.40 : 105,553.32 = 42,501.27 : x
2. Step 2: Convert to fraction form
   76,490.40/105,553.32 = 42,501.27/x
3. Step 3: Cross multiply
   76,490.40x = 105,553.32 × 42,501.27
4. Step 4: Simplify right side
   76,490.40x = 4,486,150,152.72
5. Step 5: Solve for x
   x = 4,486,150,152.72/76,490.40
6. Step 6: Final answer
   x = 58,649.85