Finding the Fourth Proportional to 74,807.09, 103,237.77 and 42,978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   74,807.09 : 103,237.77 = 42,978.05 : x
2. Step 2: Convert to fraction form
   74,807.09/103,237.77 = 42,978.05/x
3. Step 3: Cross multiply
   74,807.09x = 103,237.77 × 42,978.05
4. Step 4: Simplify right side
   74,807.09x = 4,436,958,040.95
5. Step 5: Solve for x
   x = 4,436,958,040.95/74,807.09
6. Step 6: Final answer
   x = 59,312.00