Finding the Fourth Proportional to 101,080.52, 139,541.10 and 78,368.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,080.52 : 139,541.10 = 78,368.12 : x
2. Step 2: Convert to fraction form
   101,080.52/139,541.10 = 78,368.12/x
3. Step 3: Cross multiply
   101,080.52x = 139,541.10 × 78,368.12
4. Step 4: Simplify right side
   101,080.52x = 10,935,573,669.73
5. Step 5: Solve for x
   x = 10,935,573,669.73/101,080.52
6. Step 6: Final answer
   x = 108,186.76