Finding the Fourth Proportional to 91,917.56, 137,993.00 and 78,154.04

Step by Step Solution

1. Step 1: Write the proportion equation
   91,917.56 : 137,993.00 = 78,154.04 : x
2. Step 2: Convert to fraction form
   91,917.56/137,993.00 = 78,154.04/x
3. Step 3: Cross multiply
   91,917.56x = 137,993.00 × 78,154.04
4. Step 4: Simplify right side
   91,917.56x = 10,784,709,360.98
5. Step 5: Solve for x
   x = 10,784,709,360.98/91,917.56
6. Step 6: Final answer
   x = 117,330.25