Finding the Fourth Proportional to 116,310.78, 174,518.01 and 42,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,310.78 : 174,518.01 = 42,421.50 : x
2. Step 2: Convert to fraction form
   116,310.78/174,518.01 = 42,421.50/x
3. Step 3: Cross multiply
   116,310.78x = 174,518.01 × 42,421.50
4. Step 4: Simplify right side
   116,310.78x = 7,403,315,761.22
5. Step 5: Solve for x
   x = 7,403,315,761.22/116,310.78
6. Step 6: Final answer
   x = 63,651.16