Finding the Fourth Proportional to 76,469.61, 105,498.61 and 56,374.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,469.61 : 105,498.61 = 56,374.27 : x
2. Step 2: Convert to fraction form
   76,469.61/105,498.61 = 56,374.27/x
3. Step 3: Cross multiply
   76,469.61x = 105,498.61 × 56,374.27
4. Step 4: Simplify right side
   76,469.61x = 5,947,407,124.76
5. Step 5: Solve for x
   x = 5,947,407,124.76/76,469.61
6. Step 6: Final answer
   x = 77,774.78