Finding the Fourth Proportional to 99,940.18, 137,941.94 and 56,945.02

Step by Step Solution

1. Step 1: Write the proportion equation
   99,940.18 : 137,941.94 = 56,945.02 : x
2. Step 2: Convert to fraction form
   99,940.18/137,941.94 = 56,945.02/x
3. Step 3: Cross multiply
   99,940.18x = 137,941.94 × 56,945.02
4. Step 4: Simplify right side
   99,940.18x = 7,855,106,532.14
5. Step 5: Solve for x
   x = 7,855,106,532.14/99,940.18
6. Step 6: Final answer
   x = 78,598.08