Finding the Fourth Proportional to 148,199.50, 204,515.32 and 81,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,199.50 : 204,515.32 = 81,131.50 : x
2. Step 2: Convert to fraction form
   148,199.50/204,515.32 = 81,131.50/x
3. Step 3: Cross multiply
   148,199.50x = 204,515.32 × 81,131.50
4. Step 4: Simplify right side
   148,199.50x = 16,592,634,684.58
5. Step 5: Solve for x
   x = 16,592,634,684.58/148,199.50
6. Step 6: Final answer
   x = 111,961.48