Finding the Fourth Proportional to 118,988.56, 164,143.06 and 78,146.83

Step by Step Solution

1. Step 1: Write the proportion equation
   118,988.56 : 164,143.06 = 78,146.83 : x
2. Step 2: Convert to fraction form
   118,988.56/164,143.06 = 78,146.83/x
3. Step 3: Cross multiply
   118,988.56x = 164,143.06 × 78,146.83
4. Step 4: Simplify right side
   118,988.56x = 12,827,259,331.58
5. Step 5: Solve for x
   x = 12,827,259,331.58/118,988.56
6. Step 6: Final answer
   x = 107,802.46