Finding the Fourth Proportional to 105,196.02, 157,872.40 and 77,188.44

Step by Step Solution

1. Step 1: Write the proportion equation
   105,196.02 : 157,872.40 = 77,188.44 : x
2. Step 2: Convert to fraction form
   105,196.02/157,872.40 = 77,188.44/x
3. Step 3: Cross multiply
   105,196.02x = 157,872.40 × 77,188.44
4. Step 4: Simplify right side
   105,196.02x = 12,185,924,275.06
5. Step 5: Solve for x
   x = 12,185,924,275.06/105,196.02
6. Step 6: Final answer
   x = 115,840.16