Finding the Fourth Proportional to 141,840.72, 212,761.78 and 42,002.80

Step by Step Solution

1. Step 1: Write the proportion equation
   141,840.72 : 212,761.78 = 42,002.80 : x
2. Step 2: Convert to fraction form
   141,840.72/212,761.78 = 42,002.80/x
3. Step 3: Cross multiply
   141,840.72x = 212,761.78 × 42,002.80
4. Step 4: Simplify right side
   141,840.72x = 8,936,590,492.98
5. Step 5: Solve for x
   x = 8,936,590,492.98/141,840.72
6. Step 6: Final answer
   x = 63,004.41