Finding the Fourth Proportional to 105,094.30, 157,411.05 and 91,270.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,094.30 : 157,411.05 = 91,270.30 : x
2. Step 2: Convert to fraction form
   105,094.30/157,411.05 = 91,270.30/x
3. Step 3: Cross multiply
   105,094.30x = 157,411.05 × 91,270.30
4. Step 4: Simplify right side
   105,094.30x = 14,366,953,756.82
5. Step 5: Solve for x
   x = 14,366,953,756.82/105,094.30
6. Step 6: Final answer
   x = 136,705.36