Finding the Fourth Proportional to 74,262.78, 102,488.06 and 42,431.00

Step by Step Solution

1. Step 1: Write the proportion equation
   74,262.78 : 102,488.06 = 42,431.00 : x
2. Step 2: Convert to fraction form
   74,262.78/102,488.06 = 42,431.00/x
3. Step 3: Cross multiply
   74,262.78x = 102,488.06 × 42,431.00
4. Step 4: Simplify right side
   74,262.78x = 4,348,670,467.50
5. Step 5: Solve for x
   x = 4,348,670,467.50/74,262.78
6. Step 6: Final answer
   x = 58,557.87