Finding the Fourth Proportional to 76,779.16, 105,950.86 and 42,317.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,779.16 : 105,950.86 = 42,317.06 : x
2. Step 2: Convert to fraction form
   76,779.16/105,950.86 = 42,317.06/x
3. Step 3: Cross multiply
   76,779.16x = 105,950.86 × 42,317.06
4. Step 4: Simplify right side
   76,779.16x = 4,483,528,899.67
5. Step 5: Solve for x
   x = 4,483,528,899.67/76,779.16
6. Step 6: Final answer
   x = 58,395.13