Finding the Fourth Proportional to 99,461.42, 137,259.72 and 61,243.02

Step by Step Solution

1. Step 1: Write the proportion equation
   99,461.42 : 137,259.72 = 61,243.02 : x
2. Step 2: Convert to fraction form
   99,461.42/137,259.72 = 61,243.02/x
3. Step 3: Cross multiply
   99,461.42x = 137,259.72 × 61,243.02
4. Step 4: Simplify right side
   99,461.42x = 8,406,199,090.86
5. Step 5: Solve for x
   x = 8,406,199,090.86/99,461.42
6. Step 6: Final answer
   x = 84,517.18