Finding the Fourth Proportional to 52,142.88, 78,213.64 and 12,700.04

Step by Step Solution

1. Step 1: Write the proportion equation
   52,142.88 : 78,213.64 = 12,700.04 : x
2. Step 2: Convert to fraction form
   52,142.88/78,213.64 = 12,700.04/x
3. Step 3: Cross multiply
   52,142.88x = 78,213.64 × 12,700.04
4. Step 4: Simplify right side
   52,142.88x = 993,316,356.55
5. Step 5: Solve for x
   x = 993,316,356.55/52,142.88
6. Step 6: Final answer
   x = 19,049.89