Finding the Fourth Proportional to 91,863.34, 126,785.28 and 56,074.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91,863.34 : 126,785.28 = 56,074.15 : x
2. Step 2: Convert to fraction form
   91,863.34/126,785.28 = 56,074.15/x
3. Step 3: Cross multiply
   91,863.34x = 126,785.28 × 56,074.15
4. Step 4: Simplify right side
   91,863.34x = 7,109,376,808.51
5. Step 5: Solve for x
   x = 7,109,376,808.51/91,863.34
6. Step 6: Final answer
   x = 77,390.79