Finding the Fourth Proportional to 99,942,819.89, 137,918,501.51 and 55,290,441.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,942,819.89 : 137,918,501.51 = 55,290,441.42 : x
2. Step 2: Convert to fraction form
   99,942,819.89/137,918,501.51 = 55,290,441.42/x
3. Step 3: Cross multiply
   99,942,819.89x = 137,918,501.51 × 55,290,441.42
4. Step 4: Simplify right side
   99,942,819.89x = 7,625,574,828,196,384
5. Step 5: Solve for x
   x = 7,625,574,828,196,384/99,942,819.89
6. Step 6: Final answer
   x = 76,299,376.35