Finding the Fourth Proportional to 99,835.90, 137,772.84 and 54,513.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99,835.90 : 137,772.84 = 54,513.86 : x
2. Step 2: Convert to fraction form
   99,835.90/137,772.84 = 54,513.86/x
3. Step 3: Cross multiply
   99,835.90x = 137,772.84 × 54,513.86
4. Step 4: Simplify right side
   99,835.90x = 7,510,529,311.56
5. Step 5: Solve for x
   x = 7,510,529,311.56/99,835.90
6. Step 6: Final answer
   x = 75,228.75