Finding the Fourth Proportional to 91,421,644.86, 137,152,790.01 and 42,873,623.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,421,644.86 : 137,152,790.01 = 42,873,623.78 : x
2. Step 2: Convert to fraction form
   91,421,644.86/137,152,790.01 = 42,873,623.78/x
3. Step 3: Cross multiply
   91,421,644.86x = 137,152,790.01 × 42,873,623.78
4. Step 4: Simplify right side
   91,421,644.86x = 5,880,237,118,580,318
5. Step 5: Solve for x
   x = 5,880,237,118,580,318/91,421,644.86
6. Step 6: Final answer
   x = 64,319,966.32