Finding the Fourth Proportional to 99,142, 136,818.84 and 54,432.88

Step by Step Solution

1. Step 1: Write the proportion equation
   99,142 : 136,818.84 = 54,432.88 : x
2. Step 2: Convert to fraction form
   99,142/136,818.84 = 54,432.88/x
3. Step 3: Cross multiply
   99,142x = 136,818.84 × 54,432.88
4. Step 4: Simplify right side
   99,142x = 7,447,443,499.46
5. Step 5: Solve for x
   x = 7,447,443,499.46/99,142
6. Step 6: Final answer
   x = 75,118.96