Finding the Fourth Proportional to 99,549,091.78, 137,370,731.61 and 55,494,141.90

Step by Step Solution

1. Step 1: Write the proportion equation
   99,549,091.78 : 137,370,731.61 = 55,494,141.90 : x
2. Step 2: Convert to fraction form
   99,549,091.78/137,370,731.61 = 55,494,141.90/x
3. Step 3: Cross multiply
   99,549,091.78x = 137,370,731.61 × 55,494,141.90
4. Step 4: Simplify right side
   99,549,091.78x = 7,623,270,872,872,156
5. Step 5: Solve for x
   x = 7,623,270,872,872,156/99,549,091.78
6. Step 6: Final answer
   x = 76,578,005.25