Finding the Fourth Proportional to 99,357.30, 137,114.69 and 54,036.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99,357.30 : 137,114.69 = 54,036.18 : x
2. Step 2: Convert to fraction form
   99,357.30/137,114.69 = 54,036.18/x
3. Step 3: Cross multiply
   99,357.30x = 137,114.69 × 54,036.18
4. Step 4: Simplify right side
   99,357.30x = 7,409,153,799.30
5. Step 5: Solve for x
   x = 7,409,153,799.30/99,357.30
6. Step 6: Final answer
   x = 74,570.80