Finding the Fourth Proportional to 99,089.19, 148,638.69 and 39,916.89

Step by Step Solution

1. Step 1: Write the proportion equation
   99,089.19 : 148,638.69 = 39,916.89 : x
2. Step 2: Convert to fraction form
   99,089.19/148,638.69 = 39,916.89/x
3. Step 3: Cross multiply
   99,089.19x = 148,638.69 × 39,916.89
4. Step 4: Simplify right side
   99,089.19x = 5,933,194,238.47
5. Step 5: Solve for x
   x = 5,933,194,238.47/99,089.19
6. Step 6: Final answer
   x = 59,877.31