Finding the Fourth Proportional to 705,911,667.08, 1,058,478,711.42 and 291,294,242.78

Step by Step Solution

1. Step 1: Write the proportion equation
   705,911,667.08 : 1,058,478,711.42 = 291,294,242.78 : x
2. Step 2: Convert to fraction form
   705,911,667.08/1,058,478,711.42 = 291,294,242.78/x
3. Step 3: Cross multiply
   705,911,667.08x = 1,058,478,711.42 × 291,294,242.78
4. Step 4: Simplify right side
   705,911,667.08x = 308,328,754,741,838,976
5. Step 5: Solve for x
   x = 308,328,754,741,838,976/705,911,667.08
6. Step 6: Final answer
   x = 436,780,930.42