Finding the Fourth Proportional to 99,606.48, 137,452.28 and 56,584.91

Step by Step Solution

1. Step 1: Write the proportion equation
   99,606.48 : 137,452.28 = 56,584.91 : x
2. Step 2: Convert to fraction form
   99,606.48/137,452.28 = 56,584.91/x
3. Step 3: Cross multiply
   99,606.48x = 137,452.28 × 56,584.91
4. Step 4: Simplify right side
   99,606.48x = 7,777,724,953.80
5. Step 5: Solve for x
   x = 7,777,724,953.80/99,606.48
6. Step 6: Final answer
   x = 78,084.53