Finding the Fourth Proportional to 141,680.61, 212,275.49 and 99,480.42

Step by Step Solution

1. Step 1: Write the proportion equation
   141,680.61 : 212,275.49 = 99,480.42 : x
2. Step 2: Convert to fraction form
   141,680.61/212,275.49 = 99,480.42/x
3. Step 3: Cross multiply
   141,680.61x = 212,275.49 × 99,480.42
4. Step 4: Simplify right side
   141,680.61x = 21,117,254,403.50
5. Step 5: Solve for x
   x = 21,117,254,403.50/141,680.61
6. Step 6: Final answer
   x = 149,048.30