Finding the Fourth Proportional to 115,109.60, 158,875.74 and 77,361.98

Step by Step Solution

1. Step 1: Write the proportion equation
   115,109.60 : 158,875.74 = 77,361.98 : x
2. Step 2: Convert to fraction form
   115,109.60/158,875.74 = 77,361.98/x
3. Step 3: Cross multiply
   115,109.60x = 158,875.74 × 77,361.98
4. Step 4: Simplify right side
   115,109.60x = 12,290,941,820.37
5. Step 5: Solve for x
   x = 12,290,941,820.37/115,109.60
6. Step 6: Final answer
   x = 106,775.99