Finding the Fourth Proportional to 302,131.88, 453,214.38 and 99,719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   302,131.88 : 453,214.38 = 99,719.72 : x
2. Step 2: Convert to fraction form
   302,131.88/453,214.38 = 99,719.72/x
3. Step 3: Cross multiply
   302,131.88x = 453,214.38 × 99,719.72
4. Step 4: Simplify right side
   302,131.88x = 45,194,411,073.57
5. Step 5: Solve for x
   x = 45,194,411,073.57/302,131.88
6. Step 6: Final answer
   x = 149,585.05