Finding the Fourth Proportional to 290,395.72, 435,514.20 and 88,013.98

Step by Step Solution

1. Step 1: Write the proportion equation
   290,395.72 : 435,514.20 = 88,013.98 : x
2. Step 2: Convert to fraction form
   290,395.72/435,514.20 = 88,013.98/x
3. Step 3: Cross multiply
   290,395.72x = 435,514.20 × 88,013.98
4. Step 4: Simplify right side
   290,395.72x = 38,331,338,088.52
5. Step 5: Solve for x
   x = 38,331,338,088.52/290,395.72
6. Step 6: Final answer
   x = 131,996.91