Finding the Fourth Proportional to 52,066.34, 78,128.65 and 28,375.49

Step by Step Solution

1. Step 1: Write the proportion equation
   52,066.34 : 78,128.65 = 28,375.49 : x
2. Step 2: Convert to fraction form
   52,066.34/78,128.65 = 28,375.49/x
3. Step 3: Cross multiply
   52,066.34x = 78,128.65 × 28,375.49
4. Step 4: Simplify right side
   52,066.34x = 2,216,938,851.17
5. Step 5: Solve for x
   x = 2,216,938,851.17/52,066.34
6. Step 6: Final answer
   x = 42,579.12