Finding the Fourth Proportional to 137,308.12, 189,488.72 and 76,891.53

Step by Step Solution

1. Step 1: Write the proportion equation
   137,308.12 : 189,488.72 = 76,891.53 : x
2. Step 2: Convert to fraction form
   137,308.12/189,488.72 = 76,891.53/x
3. Step 3: Cross multiply
   137,308.12x = 189,488.72 × 76,891.53
4. Step 4: Simplify right side
   137,308.12x = 14,570,077,790.77
5. Step 5: Solve for x
   x = 14,570,077,790.77/137,308.12
6. Step 6: Final answer
   x = 106,112.28