Finding the Fourth Proportional to 99,855.57, 137,566.31 and 69,585.87

Step by Step Solution

1. Step 1: Write the proportion equation
   99,855.57 : 137,566.31 = 69,585.87 : x
2. Step 2: Convert to fraction form
   99,855.57/137,566.31 = 69,585.87/x
3. Step 3: Cross multiply
   99,855.57x = 137,566.31 × 69,585.87
4. Step 4: Simplify right side
   99,855.57x = 9,572,671,364.04
5. Step 5: Solve for x
   x = 9,572,671,364.04/99,855.57
6. Step 6: Final answer
   x = 95,865.17