Finding the Fourth Proportional to 99,047.42, 136,685.85 and 56,607.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,047.42 : 136,685.85 = 56,607.38 : x
2. Step 2: Convert to fraction form
   99,047.42/136,685.85 = 56,607.38/x
3. Step 3: Cross multiply
   99,047.42x = 136,685.85 × 56,607.38
4. Step 4: Simplify right side
   99,047.42x = 7,737,427,851.57
5. Step 5: Solve for x
   x = 7,737,427,851.57/99,047.42
6. Step 6: Final answer
   x = 78,118.42