Finding the Fourth Proportional to 93,215.58, 139,119.15 and 86,895.15

Step by Step Solution

1. Step 1: Write the proportion equation
   93,215.58 : 139,119.15 = 86,895.15 : x
2. Step 2: Convert to fraction form
   93,215.58/139,119.15 = 86,895.15/x
3. Step 3: Cross multiply
   93,215.58x = 139,119.15 × 86,895.15
4. Step 4: Simplify right side
   93,215.58x = 12,088,779,407.12
5. Step 5: Solve for x
   x = 12,088,779,407.12/93,215.58
6. Step 6: Final answer
   x = 129,686.25