Finding the Fourth Proportional to 76,296.30, 105,284.64 and 42,302.79

Step by Step Solution

1. Step 1: Write the proportion equation
   76,296.30 : 105,284.64 = 42,302.79 : x
2. Step 2: Convert to fraction form
   76,296.30/105,284.64 = 42,302.79/x
3. Step 3: Cross multiply
   76,296.30x = 105,284.64 × 42,302.79
4. Step 4: Simplify right side
   76,296.30x = 4,453,834,174.78
5. Step 5: Solve for x
   x = 4,453,834,174.78/76,296.30
6. Step 6: Final answer
   x = 58,375.50