Finding the Fourth Proportional to 99,817.56, 137,746.42 and 56,796.11

Step by Step Solution

1. Step 1: Write the proportion equation
   99,817.56 : 137,746.42 = 56,796.11 : x
2. Step 2: Convert to fraction form
   99,817.56/137,746.42 = 56,796.11/x
3. Step 3: Cross multiply
   99,817.56x = 137,746.42 × 56,796.11
4. Step 4: Simplify right side
   99,817.56x = 7,823,461,024.80
5. Step 5: Solve for x
   x = 7,823,461,024.80/99,817.56
6. Step 6: Final answer
   x = 78,377.60