Finding the Fourth Proportional to 99,665.16, 137,460.06 and 63,858.66

Step by Step Solution

1. Step 1: Write the proportion equation
   99,665.16 : 137,460.06 = 63,858.66 : x
2. Step 2: Convert to fraction form
   99,665.16/137,460.06 = 63,858.66/x
3. Step 3: Cross multiply
   99,665.16x = 137,460.06 × 63,858.66
4. Step 4: Simplify right side
   99,665.16x = 8,778,015,235.12
5. Step 5: Solve for x
   x = 8,778,015,235.12/99,665.16
6. Step 6: Final answer
   x = 88,075.06