Finding the Fourth Proportional to 76,940.90, 106,196.15 and 45,120.05

Step by Step Solution

1. Step 1: Write the proportion equation
   76,940.90 : 106,196.15 = 45,120.05 : x
2. Step 2: Convert to fraction form
   76,940.90/106,196.15 = 45,120.05/x
3. Step 3: Cross multiply
   76,940.90x = 106,196.15 × 45,120.05
4. Step 4: Simplify right side
   76,940.90x = 4,791,575,597.81
5. Step 5: Solve for x
   x = 4,791,575,597.81/76,940.90
6. Step 6: Final answer
   x = 62,276.05