Finding the Fourth Proportional to 76,779.27, 105,950.74 and 42,322.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,779.27 : 105,950.74 = 42,322.50 : x
2. Step 2: Convert to fraction form
   76,779.27/105,950.74 = 42,322.50/x
3. Step 3: Cross multiply
   76,779.27x = 105,950.74 × 42,322.50
4. Step 4: Simplify right side
   76,779.27x = 4,484,099,981.68
5. Step 5: Solve for x
   x = 4,484,099,981.68/76,779.27
6. Step 6: Final answer
   x = 58,402.48