Finding the Fourth Proportional to 99,782.86, 137,703.18 and 54,463.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,782.86 : 137,703.18 = 54,463.72 : x
2. Step 2: Convert to fraction form
   99,782.86/137,703.18 = 54,463.72/x
3. Step 3: Cross multiply
   99,782.86x = 137,703.18 × 54,463.72
4. Step 4: Simplify right side
   99,782.86x = 7,499,827,438.63
5. Step 5: Solve for x
   x = 7,499,827,438.63/99,782.86
6. Step 6: Final answer
   x = 75,161.48