Finding the Fourth Proportional to 105,570.54, 157,562.91 and 91,275.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,570.54 : 157,562.91 = 91,275.78 : x
2. Step 2: Convert to fraction form
   105,570.54/157,562.91 = 91,275.78/x
3. Step 3: Cross multiply
   105,570.54x = 157,562.91 × 91,275.78
4. Step 4: Simplify right side
   105,570.54x = 14,381,677,509.32
5. Step 5: Solve for x
   x = 14,381,677,509.32/105,570.54
6. Step 6: Final answer
   x = 136,228.13