Finding the Fourth Proportional to 126,499.84, 189,802.21 and 55,385.78

Step by Step Solution

1. Step 1: Write the proportion equation
   126,499.84 : 189,802.21 = 55,385.78 : x
2. Step 2: Convert to fraction form
   126,499.84/189,802.21 = 55,385.78/x
3. Step 3: Cross multiply
   126,499.84x = 189,802.21 × 55,385.78
4. Step 4: Simplify right side
   126,499.84x = 10,512,342,618.72
5. Step 5: Solve for x
   x = 10,512,342,618.72/126,499.84
6. Step 6: Final answer
   x = 83,101.63