Finding the Fourth Proportional to 101,991.86, 152,987.77 and 31,871.18

Step by Step Solution

1. Step 1: Write the proportion equation
   101,991.86 : 152,987.77 = 31,871.18 : x
2. Step 2: Convert to fraction form
   101,991.86/152,987.77 = 31,871.18/x
3. Step 3: Cross multiply
   101,991.86x = 152,987.77 × 31,871.18
4. Step 4: Simplify right side
   101,991.86x = 4,875,899,831.17
5. Step 5: Solve for x
   x = 4,875,899,831.17/101,991.86
6. Step 6: Final answer
   x = 47,806.75