Finding the Fourth Proportional to 92,901.98, 139,240.38 and 42,878

Step by Step Solution

1. Step 1: Write the proportion equation
   92,901.98 : 139,240.38 = 42,878 : x
2. Step 2: Convert to fraction form
   92,901.98/139,240.38 = 42,878/x
3. Step 3: Cross multiply
   92,901.98x = 139,240.38 × 42,878
4. Step 4: Simplify right side
   92,901.98x = 5,970,349,013.64
5. Step 5: Solve for x
   x = 5,970,349,013.64/92,901.98
6. Step 6: Final answer
   x = 64,265.04