Finding the Fourth Proportional to 148,140, 204,433.61 and 81,072

Step by Step Solution

1. Step 1: Write the proportion equation
   148,140 : 204,433.61 = 81,072 : x
2. Step 2: Convert to fraction form
   148,140/204,433.61 = 81,072/x
3. Step 3: Cross multiply
   148,140x = 204,433.61 × 81,072
4. Step 4: Simplify right side
   148,140x = 16,573,841,224.56
5. Step 5: Solve for x
   x = 16,573,841,224.56/148,140
6. Step 6: Final answer
   x = 111,879.58