Finding the Fourth Proportional to 99,607.50, 137,460.33 and 54,285.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,607.50 : 137,460.33 = 54,285.30 : x
2. Step 2: Convert to fraction form
   99,607.50/137,460.33 = 54,285.30/x
3. Step 3: Cross multiply
   99,607.50x = 137,460.33 × 54,285.30
4. Step 4: Simplify right side
   99,607.50x = 7,462,075,252.15
5. Step 5: Solve for x
   x = 7,462,075,252.15/99,607.50
6. Step 6: Final answer
   x = 74,914.79