Finding the Fourth Proportional to 296,945.63, 445,492.71 and 86,583.57

Step by Step Solution

1. Step 1: Write the proportion equation
   296,945.63 : 445,492.71 = 86,583.57 : x
2. Step 2: Convert to fraction form
   296,945.63/445,492.71 = 86,583.57/x
3. Step 3: Cross multiply
   296,945.63x = 445,492.71 × 86,583.57
4. Step 4: Simplify right side
   296,945.63x = 38,572,349,240.77
5. Step 5: Solve for x
   x = 38,572,349,240.77/296,945.63
6. Step 6: Final answer
   x = 129,897.01