Finding the Fourth Proportional to 103,528.48, 142,878.42 and 61,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,528.48 : 142,878.42 = 61,078.72 : x
2. Step 2: Convert to fraction form
   103,528.48/142,878.42 = 61,078.72/x
3. Step 3: Cross multiply
   103,528.48x = 142,878.42 × 61,078.72
4. Step 4: Simplify right side
   103,528.48x = 8,726,831,009.22
5. Step 5: Solve for x
   x = 8,726,831,009.22/103,528.48
6. Step 6: Final answer
   x = 84,294.01