Finding the Fourth Proportional to 98,870.82, 136,448.73 and 56,435.73

Step by Step Solution

1. Step 1: Write the proportion equation
   98,870.82 : 136,448.73 = 56,435.73 : x
2. Step 2: Convert to fraction form
   98,870.82/136,448.73 = 56,435.73/x
3. Step 3: Cross multiply
   98,870.82x = 136,448.73 × 56,435.73
4. Step 4: Simplify right side
   98,870.82x = 7,700,583,685.12
5. Step 5: Solve for x
   x = 7,700,583,685.12/98,870.82
6. Step 6: Final answer
   x = 77,885.30