Finding the Fourth Proportional to 105,283.32, 145,444.64 and 91,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,283.32 : 145,444.64 = 91,111.56 : x
2. Step 2: Convert to fraction form
   105,283.32/145,444.64 = 91,111.56/x
3. Step 3: Cross multiply
   105,283.32x = 145,444.64 × 91,111.56
4. Step 4: Simplify right side
   105,283.32x = 13,251,688,044.04
5. Step 5: Solve for x
   x = 13,251,688,044.04/105,283.32
6. Step 6: Final answer
   x = 125,866.93