Finding the Fourth Proportional to 76,503, 105,571.80 and 42,511.32

Step by Step Solution

1. Step 1: Write the proportion equation
   76,503 : 105,571.80 = 42,511.32 : x
2. Step 2: Convert to fraction form
   76,503/105,571.80 = 42,511.32/x
3. Step 3: Cross multiply
   76,503x = 105,571.80 × 42,511.32
4. Step 4: Simplify right side
   76,503x = 4,487,996,572.78
5. Step 5: Solve for x
   x = 4,487,996,572.78/76,503
6. Step 6: Final answer
   x = 58,664.32