Finding the Fourth Proportional to 113,139.38, 156,134.86 and 65,394.74

Step by Step Solution

1. Step 1: Write the proportion equation
   113,139.38 : 156,134.86 = 65,394.74 : x
2. Step 2: Convert to fraction form
   113,139.38/156,134.86 = 65,394.74/x
3. Step 3: Cross multiply
   113,139.38x = 156,134.86 × 65,394.74
4. Step 4: Simplify right side
   113,139.38x = 10,210,398,574.64
5. Step 5: Solve for x
   x = 10,210,398,574.64/113,139.38
6. Step 6: Final answer
   x = 90,246.20