Finding the Fourth Proportional to 99,612.03, 137,460.56 and 54,289.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,612.03 : 137,460.56 = 54,289.05 : x
2. Step 2: Convert to fraction form
   99,612.03/137,460.56 = 54,289.05/x
3. Step 3: Cross multiply
   99,612.03x = 137,460.56 × 54,289.05
4. Step 4: Simplify right side
   99,612.03x = 7,462,602,943.42
5. Step 5: Solve for x
   x = 7,462,602,943.42/99,612.03
6. Step 6: Final answer
   x = 74,916.68