Finding the Fourth Proportional to 105,989.31, 158,637.83 and 77,901.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,989.31 : 158,637.83 = 77,901.93 : x
2. Step 2: Convert to fraction form
   105,989.31/158,637.83 = 77,901.93/x
3. Step 3: Cross multiply
   105,989.31x = 158,637.83 × 77,901.93
4. Step 4: Simplify right side
   105,989.31x = 12,358,192,738.50
5. Step 5: Solve for x
   x = 12,358,192,738.50/105,989.31
6. Step 6: Final answer
   x = 116,598.48