Finding the Fourth Proportional to 139,017.82, 191,843.28 and 77,763.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,017.82 : 191,843.28 = 77,763.34 : x
2. Step 2: Convert to fraction form
   139,017.82/191,843.28 = 77,763.34/x
3. Step 3: Cross multiply
   139,017.82x = 191,843.28 × 77,763.34
4. Step 4: Simplify right side
   139,017.82x = 14,918,374,209.36
5. Step 5: Solve for x
   x = 14,918,374,209.36/139,017.82
6. Step 6: Final answer
   x = 107,312.68