Finding the Fourth Proportional to 101,082.52, 139,543.86 and 78,370.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,082.52 : 139,543.86 = 78,370.12 : x
2. Step 2: Convert to fraction form
   101,082.52/139,543.86 = 78,370.12/x
3. Step 3: Cross multiply
   101,082.52x = 139,543.86 × 78,370.12
4. Step 4: Simplify right side
   101,082.52x = 10,936,069,053.46
5. Step 5: Solve for x
   x = 10,936,069,053.46/101,082.52
6. Step 6: Final answer
   x = 108,189.52