Finding the Fourth Proportional to 91,947.86, 137,823.78 and 52,419.86

Step by Step Solution

1. Step 1: Write the proportion equation
   91,947.86 : 137,823.78 = 52,419.86 : x
2. Step 2: Convert to fraction form
   91,947.86/137,823.78 = 52,419.86/x
3. Step 3: Cross multiply
   91,947.86x = 137,823.78 × 52,419.86
4. Step 4: Simplify right side
   91,947.86x = 7,224,703,252.27
5. Step 5: Solve for x
   x = 7,224,703,252.27/91,947.86
6. Step 6: Final answer
   x = 78,573.91